Free Firebase Database

Ibrahim_Jamar · January 26, 2026, 1:08pm

`🧩 FirebaseDatabaseExtended`

An extension for MIT App Inventor 2.
Firebase Realtime Database Extension using REST API. Developed by Jamar using Fast.

Overview

FirebaseDatabaseExtended is a lightweight yet powerful extension designed to simplify and standardize Firebase Realtime Database interactions in MIT App Inventor–based environments.
It addresses inconsistencies observed in the default Firebase component and introduces structured JSON handling, controlled data merging, synchronous and asynchronous access methods, and improved error reporting.

This extension is particularly suited for developers who require,

Deterministic key–value storage (non-list-based)
JSON-to-dictionary mapping
Append/merge operations without overwriting existing data
Explicit success and error callbacks

Specifications

Package: com.firebaseextended.oi.firebasedatabaseextended
Extension Size: 20.04 KB
Minimum Android API Level: 14
Last Updated: 2026-01-26
Built & Documented Using:
FAST – Fast and Simple Extensions Toolchain Version 5.4.0

Events

FirebaseDatabaseExtended exposes a total of 5 events:

1. `OnStoreSuccess`

Triggered when data is successfully stored in Firebase.

Parameter	Type
path	text

2. `OnAppendSuccess`

Triggered when data is successfully appended or merged at a Firebase path.

Parameter	Type
path	text

3. `OnGetSuccess`

Triggered when data is successfully retrieved from Firebase.

Parameter	Type
path	text
value	text

4. `OnError`

Triggered when an error occurs during any Firebase operation.

Parameter	Type
functionName	text
errorMessage	text

5. `OnConnectionTestComplete`

Triggered after a Firebase connectivity test completes.

Parameter	Type
success	boolean
message	text

Methods

FirebaseDatabaseExtended provides 12 methods:

1. `StoreAtPath`

Stores a single key–value pair at a specified Firebase path.
Existing data at that path is overwritten.

Parameter	Type
path	text
key	text
value	any

2. `StoreValueFromJSON`

Parses a JSON string and stores all key–value pairs at the specified path.

Example JSON:

{"name":"John","age":25}

Parameter	Type
path	text
jsonText	text

3. `AppendAtPath`

Adds or updates a single key–value pair without overwriting other data at the same path.

Parameter	Type
path	text
key	text
value	any

4. `AppendFromJSON`

Parses a JSON string and merges all key–value pairs with existing data.

Parameter	Type
path	text
jsonText	text

5. `GetValue`

Retrieves a specific value by key from a Firebase path.
Returns an empty string if the key does not exist.

Parameter	Type
path	text
key	text

6. `GetAllValues`

Retrieves all key–value pairs at a Firebase path as a JSON string.

Parameter	Type
path	text

7. `DeleteAtPath`

Deletes all data at the specified Firebase path.

Parameter	Type
path	text

8. `TestConnection`

Tests the current Firebase configuration and connectivity.

9. `ValidateJSON`

Checks whether the provided text is a valid JSON string.

Return type: boolean

Parameter	Type
jsonText	text

10. `CreateJSON`

Generates a JSON string from multiple key–value pairs.

Example:

CreateJSON("name", "John", "age", 25)

Return type: text

Parameter	Type
keyValuePairs	any

11. `GetValueSync`

Synchronously retrieves a value from Firebase.
Blocks execution until a response is received; use cautiously to avoid UI freezes.

Return type: text

Parameter	Type
path	text
key	text

12. `GetAllValuesSync`

Synchronously retrieves all values at a Firebase path as a JSON string.

Return type: text

Parameter	Type
path	text

Designer Properties

FirebaseDatabaseExtended includes 3 designer properties:

1. `FirebaseDatabaseUrl`

Type: string
Default: https://your-project.firebaseio.com/

2. `FirebaseApiKey`

Type: string

3. `ProjectIdBucket`

Type: string

Setter Properties

`FirebaseDatabaseUrl`

The Firebase Realtime Database URL.
Must end with a trailing slash (/).

`FirebaseApiKey`

Your Firebase Web API Key
(Firebase Console → Project Settings → Web API Key).

`ProjectIdBucket`

Optional project ID bucket.
Typically not required for standard operations.

Getter Properties

Each getter returns the currently configured value:

FirebaseDatabaseUrl → text
FirebaseApiKey → text
ProjectIdBucket → text

Blocks

AIX
com.firebaseextended.oi.firebasedatabaseextended.aix (20.0 KB)

Acknowledgements & Notes

This extension was created to mitigate inconsistent behavior observed in the default Firebase component.
Special thanks to @jewel for the Fast CL
, which significantly simplifies extension development and publishing, thank to @curious_singh for this thread, it boosted something

Quick sample usage

Additional features and improvements are planned and will be released in upcoming updates.

FirebaseDatabaseExtended v6 – Major Update

📄 DOCS

`🧩 FirebaseDatabaseExtended`

An extension for MIT App Inventor 2.
Complete Firebase Realtime Database Extension using REST API. Now with realtime listeners, offline queue, and advanced utilities. Developed by Jamar.

Specifications

Package: com.firebaseextended.oi.firebasedatabaseextended
Size: 49.23 KB
Minimum API Level: 14
Updated On: 2026-06-15T22:00:00Z
Built & documented using: FAST v6.0.0

`Events:`

FirebaseDatabaseExtended has total 16 events.

1. OnStoreSuccess

Triggered when data is successfully stored.

Parameter	Type
path	text

2. OnAppendSuccess

Triggered when data is successfully appended.

Parameter	Type
path	text

3. OnGetSuccess

Triggered when data is successfully retrieved.

Parameter	Type
path	text
value	text

4. OnDeleteSuccess

Triggered when data is successfully deleted.

Parameter	Type
path	text

5. OnPushSuccess

Triggered when data is successfully pushed with unique key.

Parameter	Type
path	text
key	text

6. OnQuerySuccess

Triggered when a query operation completes successfully.

Parameter	Type
path	text
results	text

7. OnBatchSuccess

Triggered when batch operation completes successfully.

Parameter	Type
operation	text
count	number

8. OnTransactionSuccess

Triggered when a transaction/counter operation completes.

Parameter	Type
path	text
newValue	text

9. OnConnectionChanged

Triggered when connection status changes.

Parameter	Type
isConnected	boolean

10. OnError

Triggered when any error occurs.

Parameter	Type
functionName	text
errorMessage	text

11. DataChanged

Fired when data at a path changes (realtime listener).

Parameter	Type
path	text
value	text

12. ChildAdded

Fired when a child is added (realtime listener).

Parameter	Type
path	text
value	text

13. ChildRemoved

Fired when a child is removed (realtime listener).

Parameter	Type
path	text

14. ChildChanged

Fired when a child is changed (realtime listener).

Parameter	Type
path	text
value	text

15. ConnectionStatus

Fired in response to GetConnectionStatus().

Parameter	Type
online	boolean

16. PingResult

Fired in response to PingDatabase() with latency in ms.

Parameter	Type
latencyMs	number

`Methods:`

FirebaseDatabaseExtended has total 77 methods.

1. StoreAtPath

Stores a single key-value pair at the specified path.

Parameter	Type
path	text
key	text
value	any

2. StoreValue

Stores a value at root path (convenience method).

Parameter	Type
key	text
value	any

3. StoreValueFromJSON

Parses JSON and stores all key-value pairs at the specified path.

Parameter	Type
path	text
jsonText	text

4. AppendAtPath

Appends/updates a key-value pair without overwriting other data.

Parameter	Type
path	text
key	text
value	any

5. AppendValue

Appends a value at root path (convenience method).

Parameter	Type
key	text
value	any

6. AppendFromJSON

Parses JSON and merges key-value pairs with existing data.

Parameter	Type
path	text
jsonText	text

7. MergeValue

Merges a single key-value pair.

Parameter	Type
path	text
key	text
value	any

8. MergeFromJSON

Merges multiple key-value pairs from JSON with existing data.

Parameter	Type
path	text
jsonText	text

9. GetValueAtPath

Gets a specific value by key from the specified path.

Parameter	Type
path	text
key	text

10. GetValue

Gets a value from root path (convenience method).

Parameter	Type
key	text

11. GetAllAtPath

Gets all key-value pairs from the specified path.

Parameter	Type
path	text

12. GetAllValues

Gets all values from root path (convenience method).

13. DeleteAtPath

Deletes a specific key from the specified path.

Parameter	Type
path	text
key	text

14. DeleteValue

Deletes a value from root path (convenience method).

Parameter	Type
key	text

15. ClearPath

Clears all data at the specified path.

Parameter	Type
path	text

16. DeleteMultiplePaths

Deletes multiple paths specified in JSON array.

Parameter	Type
pathsJson	text

17. PushValue

Pushes a value with auto-generated unique key.

Parameter	Type
path	text
value	any

18. PushFromJSON

Pushes JSON data with auto-generated unique key.

Parameter	Type
path	text
jsonText	text

19. GeneratePushKey

Generates a Firebase-style push ID.

Return type: text

20. StoreMultiple

Stores multiple key-value pairs in a batch operation.

Parameter	Type
path	text
jsonText	text

21. UpdateMultiple

Updates multiple key-value pairs in a batch.

Parameter	Type
path	text
jsonText	text

22. GetMultiple

Gets values from multiple paths.

Parameter	Type
pathsJson	text

23. DeleteMultiple

Deletes multiple keys from a path.

Parameter	Type
path	text
keysJson	text

24. GetList

Gets data as a list from the specified path.

Parameter	Type
path	text

25. AppendToList

Appends a value to a list at the specified path.

Parameter	Type
path	text
value	any

26. RemoveFromList

Removes an item by key from a list.

Parameter	Type
path	text
key	text

27. RemoveFirstFromList

Removes the first item from a list.

Parameter	Type
path	text

28. RemoveLastFromList

Removes the last item from a list.

Parameter	Type
path	text

29. GetListItem

Gets a specific item from a list by key.

Parameter	Type
path	text
key	text

30. SetListItem

Sets/updates a specific item in a list.

Parameter	Type
path	text
key	text
value	any

31. ListLength

Gets the number of items in a list.

Parameter	Type
path	text

32. ListContains

Checks if a list contains a specific value.

Parameter	Type
path	text
value	text

33. FilterList

Filters a list based on a search term.

Parameter	Type
path	text
searchTerm	text

34. SortList

Sorts a list by keys or values.

Parameter	Type
path	text
sortBy	text

35. JsonToDictionary

Converts JSON text to App Inventor Dictionary.

Return type: dictionary

Parameter	Type
jsonText	text

36. DictionaryToJson

Converts App Inventor Dictionary to JSON text.

Return type: text

Parameter	Type
dict	dictionary

37. GetDictValue

Gets a value from a dictionary by key.

Return type: text

Parameter	Type
dict	dictionary
key	text

38. SetDictValue

Sets a value in a dictionary.

Return type: dictionary

Parameter	Type
dict	dictionary
key	text
value	any

39. RemoveDictKey

Removes a key from a dictionary.

Return type: dictionary

Parameter	Type
dict	dictionary
key	text

40. DictContainsKey

Checks if a dictionary contains a key.

Return type: boolean

Parameter	Type
dict	dictionary
key	text

41. MergeDictionaries

Merges multiple dictionaries.

Return type: dictionary

Parameter	Type
dict1	dictionary
dict2	dictionary

42. GetNestedDictValue

Gets a nested value from a dictionary using dot notation.

Return type: text

Parameter	Type
dict	dictionary
path	text

43. SetNestedDictValue

Sets a nested value in a dictionary using dot notation.

Return type: dictionary

Parameter	Type
dict	dictionary
path	text
value	any

44. FlattenDictionary

Flattens a nested dictionary to single level with dot notation keys.

Return type: dictionary

Parameter	Type
dict	dictionary

45. QueryByKey

Queries data by specific key.

Parameter	Type
path	text
key	text

46. QueryByValue

Queries data by specific value.

Parameter	Type
path	text
value	text

47. QueryStartsWith

Queries data where keys start with a prefix.

Parameter	Type
path	text
prefix	text

48. QueryEndsWith

Queries data where keys end with a suffix.

Parameter	Type
path	text
suffix	text

49. QueryEquals

Queries data where key equals specific value.

Parameter	Type
path	text
key	text
value	text

50. QueryLimit

Queries data with limit on number of results.

Parameter	Type
path	text
limit	number

51. AdvancedQuery

Advanced query with filters. Pass empty strings for unused filters.

Parameter	Type
path	text
orderBy	text
equalTo	text
startAt	text
endAt	text
limitToFirst	number
limitToLast	number

52. NormalizePath

Normalizes a Firebase path (removes extra slashes).

Return type: text

Parameter	Type
path	text

53. JoinPath

Joins multiple path segments into a single path.

Return type: text

Parameter	Type
segments	any

54. SplitPath

Splits a path into its segments.

Return type: list

Parameter	Type
path	text

55. GetChildKeys

Gets all child keys at a path.

Parameter	Type
path	text

56. GetChildCount

Gets the number of children at a path.

Parameter	Type
path	text

57. IncrementValue

Increments a numeric value at the specified path.

Parameter	Type
path	text
key	text
amount	number

58. DecrementValue

Decrements a numeric value at the specified path.

Parameter	Type
path	text
key	text
amount	number

59. CompareAndSet

Compares current value and sets new value if they match.

Parameter	Type
path	text
key	text
expectedValue	text
newValue	text

60. StartListener

Start listening to changes at a path. Events: DataChanged, ChildAdded, ChildRemoved, ChildChanged.

Parameter	Type
path	text

61. StopListener

Stop the listener for a specific path.

Parameter	Type
path	text

62. StopAllListeners

Stop all active listeners.

63. CacheData

Save data locally (SharedPreferences). Use path as key.

Parameter	Type
path	text
value	text

64. GetCachedData

Retrieve locally cached data. Returns empty string if not found.

Return type: text

Parameter	Type
path	text

65. ClearCache

Clear all cached data.

66. SyncQueuedWrites

Sync all queued writes to the server (automatically retried on failure).

67. ExportDatabase

Export the entire database as a JSON string.

68. ImportDatabase

Import a full JSON database (overwrites all data).

Parameter	Type
jsonData	text

69. BackupNode

Backup a specific node (store it locally as JSON).

Parameter	Type
path	text

70. RestoreNode

Restore a node from a previously stored backup (JSON string).

Parameter	Type
path	text
jsonBackup	text

71. GetConnectionStatus

Check if the Firebase server is reachable (simple GET).

72. PingDatabase

Ping the database (returns latency in milliseconds via PingResult event).

73. GoOnline

Sets Firebase to online mode.

74. GoOffline

Sets Firebase to offline mode.

75. Reconnect

Reconnects to Firebase.

76. IsConnected

Checks if connected to Firebase.

Return type: boolean

77. CancelPendingRequests

Cancels all pending Firebase requests.

`Designer:`

FirebaseDatabaseExtended has total 5 designer properties.

1. FirebaseUrl

Input type: string
Default value: https://your-project.firebaseio.com/

2. ApiKey

Input type: string

3. AuthToken

Input type: string

4. ProjectBucket

Input type: string

5. Timeout

Input type: integer
Default value: 10000

`Setters:`

FirebaseDatabaseExtended has total 5 setter properties.

1. FirebaseUrl

Firebase Database URL. Must end with slash. Example: https://your-project.firebaseio.com/

Input type: text

2. ApiKey

Firebase API Key (Secret) for authentication.

Input type: text

3. AuthToken

Firebase Auth Token (ID Token) – include 'Bearer ’ prefix if using ID token.

Input type: text

4. ProjectBucket

Optional project ID bucket.

Input type: text

5. Timeout

Timeout in milliseconds for Firebase requests (1000-60000).

Input type: number

`Getters:`

FirebaseDatabaseExtended has total 7 getter properties.

1. FirebaseUrl

Firebase Database URL. Must end with slash. Example: https://your-project.firebaseio.com/

Return type: text

2. ApiKey

Firebase API Key (Secret) for authentication.

Return type: text

3. AuthToken

Firebase Auth Token (ID Token) – include 'Bearer ’ prefix if using ID token.

Return type: text

4. ProjectBucket

Optional project ID bucket.

Return type: text

5. Timeout

Timeout in milliseconds for Firebase requests (1000-60000).

Return type: number

6. LastError

Returns the last error message.

Return type: text

7. LastErrorFunction

Returns the function name where last error occurred.

Return type: text

🧩 BLOCKS

Browse all available blocks, events, methods, and properties included in this extension. [extension.txt|attachment](upload://wlAfVY27Tefg7SunZC2lm14BGJI.txt) (14.5 KB)

📝 NOTE

⚠️ Before replacing or updating this extension in your project, try what functionality you need from this AIX with a test project for now.

I have not yet tested every possible use case, so if you encounter bugs or unexpected behavior or you experience any issues, I am available to help fix them.

📦 AIX

Download the latest version of this extension

com.firebaseextended.oi.firebasedatabaseextended.aix (49.2 KB)

.

curious_singh · January 26, 2026, 1:15pm

Ah, thank you so much for this quick development. I hope this is going to be helpful for those who just want to use firebase component in their projects. This extension will be a HUGE help!

Still-learning · January 26, 2026, 2:29pm

Good work dear…

(Just sharing my view) If possible pls add some formula, i mean calling specific value from each key or sorting liekweise. then your extension will be outstanding one. so users no need to use multiple extension or complex code to simplyfy theri work.

Am i correct?

Ibrahim_Jamar · January 26, 2026, 3:43pm

Thanks

Yes you’re correct and we’re connecting

Joe90 · January 26, 2026, 8:24pm

You may have handled this, but given your example (“Quick sample usage”) where you appear to have created a firebase array, you might consider what happens:

Ibrahim_Jamar · January 27, 2026, 4:05am

In my case, the numeric-looking nodes (e.g., 1 = John) are not being generated as Firebase arrays via push(). They originate directly from the JSON structure I am supplying, where those values are explicit keys, not positional indexes.

For example, if I use a structure like,

name = "Ibrahim Jamar"
platform = "Kodular"

the intention is to treat the data as a key–value map, not as a mutable list. These keys are fixed identifiers coming from the source JSON, and they are not reordered, shifted, or deleted dynamically.

I will rearrange it I don’t know if I get u clear

Joe90 · January 27, 2026, 11:56am

It will be about what comes back from a query, and also if you try to delete one of the elements, e.g. 7:"7" - you could end up with an empty element.

jon · May 9, 2026, 9:16pm

I have a problem with this extension.
What do I do when I have 2 “gets value” with the same path but different keys? How to work with the “got value” event? Because the path is the same it concentrates on the same event for me. Please add “key” as a variable to the event as well

Vega_Star · May 10, 2026, 2:37am

You mean like this

To get this data and show it in the UI:

First you get all values by using
A block of code is shown that calls the GetAllValues method from FirebaseDatabase1 with the path parameter set to "mainKey". (Captioned by AI)

When you get values you can store it like this or do a procedure or anythiing.

later you need to use JSON Text Decode to decode JSON text value and show it in UI.

This is the result of this procedure

If you want to know more and try it by yourself then you can go through the link below, over here everything is available (.aix and even .aia)

At first, you need to change URL to your RTDB URL and api key is really not necessary, you can delete that block.

Happy K

Ibrahim_Jamar · June 16, 2026, 6:28pm

FirebaseDatabaseExtended v6 is now available!

This update includes new features, performance improvements, bug fixes, and several enhancements to provide a more powerful Firebase experience.

I have rolled out more functionality and improvements in this release. Check the update details above to explore what’s new in Version 6.

bmmsah1 · June 18, 2026, 11:49pm

How made
Create a list

bmmsah1 · June 19, 2026, 12:01am

bmmsah1 · June 19, 2026, 12:04am

How made
Create a list

Ibrahim_Jamar · June 19, 2026, 4:58am

Hey @bmmsah1 welcome to kodular community

And why are you storing empty list? At least you should use make list with the values you want, can you clearly explain what you are trying to do with these blocks?

bmmsah1 · June 19, 2026, 10:50am

It doesn’t work

bmmsah1 · June 19, 2026, 10:52am

I want to design Lists

Ibrahim_Jamar · June 19, 2026, 11:02am

Hey, what doesn’t work here?

You have provided 2 different method here.

1

2

Show the whole setup please

bmmsah1 · June 19, 2026, 11:04am

You have provided 2 different method here.

2

Ibrahim_Jamar · June 19, 2026, 11:06am

How about this?

bmmsah1 · June 19, 2026, 11:06am

The old way
1

Topic		Replies	Views
How to Store Dictionary Data in Firebase Correctly? Discuss firebase	7	109	February 25, 2026
Multi-user “list” management on Firebase Guides	2	123	March 30, 2026
Data not saving as dictionary in firebase Bugs firebase , dictionary	9	146	January 26, 2026
Dictionary Format of Data Retrieve from Firebase Discuss howto , question , help	14	1994	November 30, 2021
Can I turn from Realtime db to Cloud Firestore? Discuss	14	2104	November 14, 2021

Free Firebase Database

🧩 FirebaseDatabaseExtended

Overview

Specifications

Events

1. OnStoreSuccess

2. OnAppendSuccess

3. OnGetSuccess

4. OnError

5. OnConnectionTestComplete

Methods

1. StoreAtPath

2. StoreValueFromJSON

3. AppendAtPath

4. AppendFromJSON

5. GetValue

6. GetAllValues

7. DeleteAtPath

8. TestConnection

9. ValidateJSON

10. CreateJSON

11. GetValueSync

12. GetAllValuesSync

Designer Properties

1. FirebaseDatabaseUrl

2. FirebaseApiKey

3. ProjectIdBucket

Setter Properties

FirebaseDatabaseUrl

FirebaseApiKey

ProjectIdBucket

Getter Properties

Acknowledgements & Notes

🧩 FirebaseDatabaseExtended

Specifications

Events:

1. OnStoreSuccess

2. OnAppendSuccess

3. OnGetSuccess

4. OnDeleteSuccess

5. OnPushSuccess

6. OnQuerySuccess

7. OnBatchSuccess

8. OnTransactionSuccess

9. OnConnectionChanged

10. OnError

11. DataChanged

12. ChildAdded

13. ChildRemoved

14. ChildChanged

15. ConnectionStatus

16. PingResult

Methods:

1. StoreAtPath

2. StoreValue

3. StoreValueFromJSON

4. AppendAtPath

5. AppendValue

6. AppendFromJSON

7. MergeValue

8. MergeFromJSON

9. GetValueAtPath

10. GetValue

11. GetAllAtPath

12. GetAllValues

13. DeleteAtPath

14. DeleteValue

15. ClearPath

16. DeleteMultiplePaths

17. PushValue

18. PushFromJSON

19. GeneratePushKey

20. StoreMultiple

21. UpdateMultiple

22. GetMultiple

23. DeleteMultiple

24. GetList

25. AppendToList

26. RemoveFromList

27. RemoveFirstFromList

`🧩 FirebaseDatabaseExtended`

1. `OnStoreSuccess`

2. `OnAppendSuccess`

3. `OnGetSuccess`

4. `OnError`

5. `OnConnectionTestComplete`

1. `StoreAtPath`

2. `StoreValueFromJSON`

3. `AppendAtPath`

4. `AppendFromJSON`

5. `GetValue`

6. `GetAllValues`

7. `DeleteAtPath`

8. `TestConnection`

9. `ValidateJSON`

10. `CreateJSON`

11. `GetValueSync`

12. `GetAllValuesSync`

1. `FirebaseDatabaseUrl`

2. `FirebaseApiKey`

3. `ProjectIdBucket`

`FirebaseDatabaseUrl`

`FirebaseApiKey`

`ProjectIdBucket`

`🧩 FirebaseDatabaseExtended`

`Events:`

`Methods:`

`Designer:`

`Setters:`

`Getters:`