Hey Guys.
Here are some of the apps that I have tested with the Brax3. It’s a short list, but it will help some of the newbies looking for replacement apps.
If you use a replacement app listed here, please disable or delete the original app (if possibly) so you don’t have a conflict.
Like other community members, I am a big fan of Fossify apps. You might see a few on the list below. 
If you’re coming from iphone to the Brax3 also check out @Mycenius post here for additional apps and info from his testing.
I will update the chart below with new apps as I test them.
| ITEM | APP | REPOSITORY | NOTES |
|---|---|---|---|
| Text, Calls, Video Calls | SimpleX Chat | F-Droid | Alternatives would be Briar or Molly |
| File Manager | Fossify File Manager | F-Droid | Secure file manager, better options than default |
| Calendar | Fossify Calendar | F-Droid | Privacy Focused calendar |
| Calculator | Fossify Calculator | F-Droid | Private. No permissions, Completely offline |
| Photo Gallery | Fossify Gallery | F-Droid | Open source with editor. Ad free. Private. |
| Contacts | Fossify Contacts | F-Droid | Manage contacts privately with vCard Support |
| Notes | Fossify Notes | F-Droid | Ad Free, Privacy Focused Notes, checklist, etc. |
| Music | Fossify Music Player | F-Droid | Private, Open source and Ad free |
| Music | Rhythm | IzzyOnDroid | A privacy first music player |
| Shazam | Audire | IzzyOnDroid | You will have to use split tunneling if you use a VPN |
| Camera | Open Camera | F-Droid | Original version by Mark Harman; Not the iodeOS Version. |
| Video Editor | Open Video Editor | F-Droid | Open Source Video Editor |
| Saving to Folders | Save Locally | F-Droid | Note: Not needed if Fossify File Manager is installed FFM gives option to save locally |
| Maps | CoMaps | F-Droid | Installed on Brax3 by Default |
| Clock | Chrono | F-Droid | Modern clock with alarms,timer & stopwatch |
| Video Player | VLC | F-Droid | Supports a wide range of video formats |
| Image Editor | Image Toolbox | F-Droid | Crop, filter, convert, Resize |
| YouTube Alternative | NewPipe | F-Droid | View YT videos with privacy Alternative Grayjay |
| Podcasts | AntennaPod | F-Droid | IMO this is the best open source Podcast manager & player |
| E-book Organizer | OpenReads | F-Droid | Open Source Alternative to Goodreads. |
| Password Generator | WassWord | F-Droid | Generate Password up to 128 Characters, PassPhrase up to 24 Words |
| News Reader | Feedflow | F-Droid | RSS Feed Reader. An Alternative would be Feeder |
| Weather | Breezy Weather | F-Droid | Installed on Brax3 by Default |
| eSim Manager | OpenEUICC | F-Droid | Installed on Brax3 by Default |
| Password Manager | KeePassDx | F-Droid | FOSS Password Safe. No internet connection. |
| App Security | APP Lock | F-Droid | Lock individual apps, block removal of APP lock with password |
| Panic Button | Ripple | F-Droid | Panic Button: Select what apps to wipe in an emergency |
| Photo Privacy | Scrambled Exif | F-Droid | Remove metadata from your photos before sharing them |
| Wearable Devices | GadgetBridge | F-Droid | Use your SmartWatch/Bluetooth Devices and keep your data private |
| Text Encryption | BlueCheese | F-Droid | Encrypt text messages sent by the Carrier *Recipient also needs the app |
| Text & File Encryption | DroidCrypt | F-Droid | Uses AES 256-GCM for encryption encrypt both text and files. |
| Lost Phone Locator | Find My Device (FMD) | F-Droid | Locate and control your device remotely |
| Language Translator | Translate You | F-Droid | Privacy Focused translator built with MD3 may not work with VPN If so, use split tunneling |
| VPN | Mullvad VPN | F-Droid | Anomymous No logs, DNS leak protection Wireguard |
| VPN | Proton VPN | F-Droid | No logs, Perfect forward secrecy, DNS leak protection |
| Document Viewer | LibreOffice Viewer | F-Droid | View these formats: odt,ods,odp,odg,Docx,slsx,pptx,doc,xls,ppt |
| PDF Scanner | FairScan | F-Droid | An Alternative would be MakeACopy |
| PDF Viewer | Sav PDF Viewer | IzzyOnDroid | Private PDF Viewer; No Permissions |
| Ebook Reader | Librera Reader | F-Droid | Reads: Epub, Mobi, DJVU, FB2, RTF, TXT, |
| Zip Files | ZipXtract FD | F-Droid | Fully Open Source; AES 256 Encryption |