Forums in the Mobile Apps Niche

1. GolfWRX
Forum has 5,920,557 posts.
http://www.golfwrx.com/forums/  

2. PetGroomer.com GroomerTALK and
Pet grooming forum for dog and cat groomers and mobile.
http://www.petgroomerforums.com/chat/forum.php  

3. www.drone-forum.com
Forum has 73,962 posts.
https://www.drone-forum.com/forum/  

4. Webmasters, SEO, Internet Marketing & Digital Marketing Forum
WebmasterSun is the most popular webmaster and internet marketing forums. You will find more useful information and resource here!
https://www.webmastersun.com/forums/  

5. BattleOn Forums!
https://forums2.battleon.com/f/  

6. PPCGeeks
PPCGeeks is a site for PPC owners with discussion, reviews, news, links, downloads, and much much more. We cover Windows Mobile, Android, Windows Phone 7, Blackberry, iOS, and tablets.
http://forum.ppcgeeks.com/  

7. Beyond3D Forum
The world's best online 3D graphics discussion!
http://forum.beyond3d.com/  

8. KVR: Forum Index
KVR Audio Forum - Forum - VST Plug-in, AU, AAX, Audio Software Discussion
https://www.kvraudio.com/forum/  

9. Overclockers UK Forums
Overclockers UK Forum powered by Xenforo
http://forums.overclockers.co.uk/  

10. forums.crackberry.com
The #1 Community Forum for BlackBerry Users & Abusers! BlackBerry Help, Discussion, Rumors and More...
https://forums.crackberry.com/  

11. Games Dreams
Welcome to Games Dreams - Discussion forums for Facebook games, browsers games, MMO games, flash games, android games, iPhone iPad games, etc.
https://gamesdreams.com/  

12. DJI Mavic Drone Forum
DJI Mavic Mini, Mavic, Air, Pro, Enterprise Drone User Group, Discussions, Support, Forum and Online Community
https://mavicpilots.com/  

13. SikhNet
SikhNet makes a person's spiritual journey relevant in the context of the modern world and the way people live now. For over 24 years SikhNet has served the millions and is the largest Sikh...
https://www.sikhnet.com/discussion/  

14. Wilders Security Forums
Community Based Discussions about Online Privacy, Security and Data Protection
http://www.wilderssecurity.com/  

15. Fantasy Football - Footballguys Forums
Forum has 11,992,505 posts.
https://forums.footballguys.com/forum/  

16. iPhone, iPad, iPod Forums at i
Discuss and get help with iPhone, iPad, iPod touch, iOS, and iCloud
https://forums.imore.com/  

17. VideoHelp
This forum will help you with all your video and audio questions!
https://forum.videohelp.com/  

18. BleepingComputer.com
A free community and discussion forum for answering Computer Help, Security, and Technical Support questions.
http://www.bleepingcomputer.com/forums/  

19. Google Community
The #1 Unofficial Google Forum to discuss and chat on the use of Google products and services, such as Gmail, AdWords, AdSense, Analytics and YouTube.
http://www.gforums.net/  

20. RunningForums.com
This website is for sale! runningforums.com is your first and best source for all of the information you’re looking for. From general topics to more of what you would expect to find here,...
http://www.runningforums.com/index.php  

21. ChiefTalk Forum
https://chieftalk.chiefarchitect.com/  

22. The Popjustice Forum
It's all about the music except when it's not.
https://forum.popjustice.com/  

23. Wacom
Forum has 5,960 posts.
http://forum.wacom.eu/  

24. Whatbird Community
Forum has 558,891 posts.
https://www.whatbird.com/forum/  

25. VBForums
Visual Basic Discussions plus .NET, C#, game programming, and more (http://www.VBForums.com)
https://www.vbforums.com/forum.php  

26. DonationCoder.com
DonationCoder.com Forum - Index
https://www.donationcoder.com/forum/  

27. MacRumors Forums
Apple news and rumor discussion
http://forums.macrumors.com/  

28. Tech Support Guy
Just missed out on a spot in the top 25.
http://forums.techguy.org/  

29. Canadian TV, Computing and Home Theatre Forums
A forum community dedicated to Canadian TV, computing and home theatre owners and enthusiasts. Come join the discussion about home audio/video, displays, troubleshooting, styles, projects, DIY’s,...
http://www.digitalhome.ca/forum/  

30. CodeGuru Forums
Hard hitting articles, dicussions, resources, and more all focusing for real developers in the real world.
https://forums.codeguru.com/index.php  

31. UAV Coach Community Forum
https://community.uavcoach.com/  

32. Ubuntu Forums
A help and support forum for Ubuntu Linux.
http://ubuntuforums.org/  

33. The Diesel Garage
A forum community dedicated to Diesel engine owners and enthusiasts. Come join the discussion about performance, builds, ecodiesel, towing capacity, modifications, classifieds, troubleshooting,...
http://www.thedieselgarage.com/forums/  

34. Bodybuilding.com
The most popular bodybuilding message boards!
https://forum.bodybuilding.com/  

35. Bitcoin Forum
Forum has 4,160 topics.
https://bitco.in/forum/  

36. Apolyton Civilization Site
Forum Description
https://apolyton.net/forum.php  

37. My Local Services
Welcome to our 100% free and friendly Small Business Forum. Gain advice, help and join in the business discussion and banter.
https://www.mylocalservices.co.uk/forum/  

38. Cell Phone Forums
Cell Phone Forums is a community for all types of cell phone users. Active forum discussion about all types of cell phone service providers and manufacturers provides an outlet for users to get...
https://cellphoneforums.net/forum.php  

39. Cable
Virgin Media (ex ntl & Telewest) Customer support and community forum
https://www.cableforum.co.uk/board/  

40. www.hrbuzz.com.au
HR Buzz is a collaboration resource for Australian HR people.
https://www.hrbuzz.com.au/forum/  

41. affLIFT
Affiliate marketing forum filled with over 50,000 affiliates and exclusive guides, case studies, and example affiliate marketing campaigns!
https://afflift.com/f/  

42. Supercell Community Forums
Supercell's official Community Forums for all fans of Clash of Clans and Hay Day! Join today!
http://forum.supercell.net/forum.php  

43. Viewing list of forums
The SoundDomain forum is the place to go for all your car audio, stereo, installation, and mobile video questions.
http://forum.sounddomain.com/ubbthreads.php  

44. TubeBuddy Forums
Forum has 108,864 posts.
https://community.tubebuddy.com/  

45. GameSpot
Join the discussion around video game news, reviews, previews, and walkthroughs for the PS4, Xbox One, PS3, Xbox 360, Wii, PC, 3DS, and DS.
https://www.gamespot.com/forums/  

46. Virtual Assistant Forums
Forum has 7,386 members.
http://www.virtualassistantforums.com/  

47. RESET Forums (homeservershow.com)
Forum has 78,275 posts.
https://homeservershow.com/forums/  

48. 3D Robotics Drone Forum
3D Robotics Solo Drone Information, Forum, Help and Community
https://3drpilots.com/  

49. Sports Card
SportsCardForum is your source for everything related to sports cards for collectors and non-collectors alike!
https://www.sportscardforum.com/forum.php  

50. Webmasters, SEO, Internet Marketing & Digital Marketing Forum
The #1 internet marketing forum for marketers, SEO specialists, webmasters, web hosting, affiliates and a marketplace to buy and sell services.
http://www.webmastersun.com/