What is a reliable VoIP provider that offers UK and German numbers, inbound + outbound and also has Android and iPhone apps?

Hey I think i Know your Answer :-)

After reading blogs and market reports, I suggest these providers:-

1. CallHippo Virtual phone numbers providers - They offer most affordable and reliable services. I am also using their services and has both Android and iPhone apps-

Here you can check - CallHippo-Virtual (VoIP/DID) Phone System – Apps on Google Play

‎CallHippo-Virtual Phone System

They offers numbers with advanced communication capabilities like:-

1. Automatic Call Distribution
2. IVR System
3. Custom Messages
4. Call Recording
5. Forward to Cellphones
6. Voice Mail
7. Working Hours Per User
8. Contact Management
9. Shared Contacts
10. Email Support
11. Priority Email
12. Free Calling Credits
13. Call from Any Number
14. Ring All Devices
15. Office/Number Opening Hours
16. Call Hold
17. Call Hold With Custom Music
18. Call Mute
19. Click to Call
20. Voicemail in Email
21. Voicemail Custom Greeting
22. Custom Integration
23. Call Notifications
24. Android App
25. iOS app
26. Outbound Caller ID
27. International Numbers
28. 3-Digit Editable Extension
29. Call Conference
30. Call Barging
31. Call transfer
32. On Call Notes
33. Call Reminder
34. Analytics
35. Concurrent Calls
36. Global Connect
37. Auto switch
38. DNI

2. Ringcentral :- is also one of the best leading providers but little bit expensive.

3. Vonage

4. Nextiva