Awesome

MQTTInspector

A general MQTT testing app for iOS (iPhone and iPad)

Supports all MQTT features 3.1, 3.1.1, cleansession, TLS, Websockets, etc.
Pre-configured Subscriptions, Publications, and Filters (stored for later use)
Ad-hoc and pre-configured PUBs
PUB payload can contain %t and %c, replaced by timestamp and clientID respectively
Support for viewing UTF-8 printable, binary and JSON payloads
Panel scrolling incoming sub's, latest on top, color-coded topics according to SUBs
Panel toggable to 'Topic'-mode. In this, incoming msgs do NOT scroll. Instead, last msg overwrites prev on a per/topic basis. Think: temp/outdoors and webserv/status where I see last value without panel scrolling moving: just values on topics change.
Panel showing low-level communication with broker
Panels can be frozen (halts all display activity) for, say, taking screenshots
Screen does not time-out

[NEW] use Testflight crash reporting, drop Fabric/Crashlytics
[NEW] Disable idle timeout while active / "monitor" mode
[NEW] MQTT over WebSocket support
[NEW] Self-signed Certs support
[NEW] UI feedback when dragging view divider
[NEW] UI feedback in ad hoc publish and filter edit
[NEW] flip layout from horizontal to vertical divides by long pressing on message view
[NEW] use UISplitviewcontroller for all devices, adds split view to iPhone 6+
[FIX] distorted split screen on iPad when changing orientation closes #72
[FIX] crashes when dragging view divider far to the left on iPads closes #66, closes #65, closes #64
[FIX] timeout on connect, closes #68
[FIX] ignore non-UTF8 topics, avoiding crash
[FIX] correctly closing input stream after error, avoiding crash

Drag to adjust screen sizes
Export (share) edit, and import your complete session settings via email / json
Filter incoming messages using regular expressions on topics, data and attributes

“@Sine_Wave_Tech: #MQTT going mainstream, hit the #Apple #appstore - great advance for #IoT https://t.co/3oXRJDsXYp”
“@voluntas: MQTTInspector 買ってみた。 http://t.co/0Wxbb0OTmG” (http://translate.google.de/#auto/en/買ってみた。
“@dobermai: Don’t know what I would have done without the MQTTInspector App by @ChristophKrey today. Mandatory #mqtt app for every iOS device!”
“@OwnTracks: Looking for a versatile MQTT debugging app? Check out MQTT Inspector for iOS by @ChristophKrey http://t.co/pTAR928DrW I'm loving it! [JP]”
“@jpmens: If you want to see a demo of what MQTT Inspector for iOS will look like, @ChristophKrey has a video here http://t.co/JhiRJL5soy”
“@jpmens: MQTT Inspector for iOS with app-side filtering & settings import/export https://t.co/Re2yQPYsUC (info: http://t.co/z26ATPPIX4)”