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 73,976 posts.
https://www.drone-forum.com/forum/  

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

5. 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/  

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

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

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

10. 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/  

11. 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/  

12. R2IClubForums
Return To India
https://www.r2iclubforums.com/forums/  

13. Fantasy Football - Footballguys Forums
Many people go football crazy over sports forums like this one.
https://forums.footballguys.com/forum/  

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

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

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

17. 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  

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

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

20. 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/  

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

22. Tech Support Guy
Forum has 8,688,007 posts.
http://forums.techguy.org/  

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

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

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

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

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

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

29. Wacom
Forum has 6,592 posts.
http://forum.wacom.eu/  

30. Java Forums at the Big Moose S
https://www.coderanch.com/forums/  

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

32. Apolyton Civilization Site
Just missed out on a spot in the top 25.
https://apolyton.net/forum.php  

33. Bitcoin Forum
Bitcoin Forum is a community of developers, academics, and entrepreneurs dedicated to promoting and improving Bitcoin.
https://bitco.in/forum/  

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

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

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

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. Supercell Community Forums
Forum has 132,854 topics.
http://forum.supercell.net/forum.php  

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

40. 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  

41. Digital Spy
Digital Spy Forum and Community, a place to discuss the latest TV, Movie and entertainment news and trends.
http://forums.digitalspy.co.uk/  

42. 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/  

43. Bali Expat Forum
A forum for expats living in Bali Indonesia
http://balipod.com/forum.php  

44. TubeBuddy Forums
Forum has 145,976 posts.
https://community.tubebuddy.com/  

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

46. 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  

47. Webmasters, SEO, Internet Marketing & Digital Marketing Forum
Forum has 25,498 posts.
http://www.webmastersun.com/  

48. Neowin
News, Reviews & Betas which includes large community peer support
https://www.neowin.net/forum/  

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

50. 3D Robotics Drone Forum
3D Robotics Solo Drone Information, Forum, Help and Community
https://3drpilots.com/