T15 Controller vs CTT Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
T15 Controller
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Using the 'T15 Controller' app on their iPhone, user can now turn 'on' (activate) or turn 'off' (deactivate) their miniature T15 radio frequency transmitter. Previously, either external magnets (for reed switch on/off control) or a separate light control box were necessary. The pulses of light transmitted by the iPhone's camera flash contain an embedded code that only T15 transmitters understand. Because the LED flash is so bright and the code is very complex there is no worry that the T15 transmitters will be accidentally receive a command via any other indoor or outdoor light source. In order to reduce the size of the T15 wildlife tracking transmitter (to the smallest size telemetry transmitter in the world) conventional activation and deactivation devices (such as magnetically controlled reed switches) had to be abandoned. This also gives biologists the added convenience of being able to control their T15 transmitters with a device that is normally with them all of the time...their iPhone!
CTT Mobile
Monitor real-time telemetry from your CTT devices. Adjust device duty cycles and connect to Bluetooth-enabled products like the Sidekick and Node Version 3.
- View latest telemetry data
- Assign device duty cycle changes
- Connect to Bluetooth enabled CTT products
- Monitor Sidekick and Node Version 3
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CTT Mobile allows you to view the latest telemetry data from your CTT devices on your mobile device. In addition you can use CTT Mobile to assign device duty cycle changes and connect to Bluetooth enabled CTT products such as the Sidekick and Node Version 3.
Screenshots
Verdict
The clearest difference is update cadence: CTT Mobile at every 2 months against T15 Controller's every 9 months. T15 Controller's advantage is iOS requirement (11.3 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
T15 Controller ships an update every 9 months, CTT Mobile every 2 months. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.
| Parameter | T15 Controller | CTT Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 9 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.3 — better | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Advanced Telemetry Systems, Inc. | Cellular Tracking Technologies |
In-app purchases
T15 Controller
No in-app purchases
CTT Mobile
No in-app purchases









