Reading App Builder can build apps for both Android and iOS platforms.

The following table indicates which features are available for each type of app. Some app features are not included currently in the iOS app, but work is in progress to add them.

Feature	Android	iOS	Remarks
Main Display
Formatted text displayed on screen	✔	✔
Display Right-to-Left texts correctly	✔	✔
Displaying Graphite fonts correctly	✔		Android app supports Graphite for Android versions 2.3 to 4.3.
Optional footer message at bottom of each chapter	✔	✔
App layout can be either left-to-right or right-to-left	✔	✔
Packaging
Custom app icon	✔	✔
Optional splash screen	✔	No	iOS Human Interface Guidelines say to not use splash screen
Navigation
Scroll up and down within a page/chapter	✔	✔
Swipe smoothly between pages/chapters	✔	✔
Swipe right-to-left between chapters in RTL scripts	✔	✔
Allow swiping to between books (optional setting)	✔	✔
Book selection popup	✔	✔
Chapter/page selection popup	✔	✔
Full Screen
Allow viewing of text in full screen mode without toolbars	✔	✔
Orientation
Allow changing from portrait to landscape view	✔	✔
Allow fixing orientation to portrait or landscape for a book	✔	✔
Font Size and Colors
Text size popup	✔	✔
Allow increase/decrease font size	✔	✔
Colour themes: light, dark and sepia	✔	✔
About Box
Displays about information (as HTML)	✔	✔
Handles HTML links to web pages	✔	✔
Handles HTML links to email addresses	✔	✔
Handles HTML links to telephone numbers	✔	✔
Expiry
Check expiry setting on startup	✔	✔
Show message if expired, and stop app if not allowed to continue.	✔	✔
Audio
Audio toolbar	✔	✔
Find audio files in app assets	✔	✔
Find audio files in device file system	✔
Download audio files from internet site	✔	✔
Highlighting phrases as audio advances	✔	✔
Forward > and Back < between phrases	✔	✔
Forward >> and Back << between section headings	✔	✔
If no timings, Forward >> and Back << between chapters	✔	✔
Audio clips: play clip when link is tapped by user	✔	✔
Playback 3gp files	✔
Search
Search screen, and display search results	✔	✔
Special character buttons	✔	✔
Checkbox: match accents/tones	✔	✔
Checkbox: match whole word	✔	✔
Illustrations
Display pictures in the text	✔	✔
Tap on picture to see it full screen	✔	✔
Allow pinch zoom on illustration annotations	✔	✔
Picture Story Books
Picture at top of each page, text underneath	✔	✔
Move between pages automatically when audio is playing	✔	✔
Ken Burns effect (pan/zoom) for moving pictures	✔	✔
Background music	✔	✔
Handle one audio file for whole book or one audio file per page	✔	✔
Handle multiple audio files per page, e.g. import Bloom book	✔	✔
Audio toolbar appears automatically	✔	✔
Audio toolbar with seek bar in landscape orientation	✔	✔
Title toolbar in landscape orientation	✔	✔
Audio/title toolbars slide away after a few seconds when playing	✔	✔
Subtitles in landscape orientation	✔	✔
Contents Menu
Contents Menu shown on app startup	✔	✔
Handle multiple levels of contents menus	✔	✔
Up navigation to go up a level – back to previous contents menu	✔	✔
Song Books
Song Lists screen, index of songs by number and title	✔	✔
Borders
Decorative borders around text	✔	✔
Choose which books should not have borders	✔	✔
Choose not to show border around introduction chapter	✔	✔
Analytics
Send analytics information to Google Analytics account	✔
Send analytics information to Firebase Analytics account	✔
Send analytics information to Amplitude Analytics account	✔
Send analytics information to Amazon Mobile Analytics account	✔
Send analytics digest information to S3 Bucket	✔
Send analytics to multiple providers	✔
Settings
Settings screen	✔	✔
Show border	✔	✔
Highlight synchronized phrases	✔	✔
User interface language	✔	✔
Layout direction	✔	✔
Sharing
Share link to app on app store (Google Play or Apple App Store)	✔	✔
Share app installer file (apk) between devices	✔