BT21 vs Co.din
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
BT21
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Customise your 7 day heating schedule faster than ever before with the BT21 app. Connect via bluetooth and control all of your thermostat settings quickly and easily.ย Once you've set up one thermostat, copy and paste all of your settings to another thermostat with easy presets. - Quick and easy heating schedule. - Copy presets to multiple thermostats. - View temperature data for the last 7 hours. - View %heating time for the last 7 days. - Send remote technical reports. - Manage temperature limits and calibration. - Set and manage all thermostat settings. - Connect to a wireless sensor (sold separately). - Lockdown mode to prevent tampering. - Hide unwanted thermostats. - Switch between heating, snow melting and power limit modes. - Switch between air, floor and remote sensors. - Access to online user guides and videos.
Co.din
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Codin is a recovery support app designed to help individuals reduce and manage codeine use through awareness, tracking, and structured guidance. Whether you are trying to quit or gradually reduce intake, Codin provides practical tools to support your journey. Features Dose Log & Monitoring Track intake history, monitor patterns, and build awareness of triggers over time. Urge Support Toolkit When cravings arise, access guided tools and interactive exercises designed to help redirect attention and reduce impulse actions. Recovery Challenges Stay motivated with structured challenges that encourage consistency and progress. Educational Courses Access recovery-focused content designed to support behavior change and long-term habit building. Progress Tracking Visualize your improvement and stay accountable to your goals. Codin is built to support individuals seeking positive change through structured tools, self-awareness, and guided recovery strategies. This app is intended as a self-support tool and does not replace professional medical advice.
Screenshots
Verdict
The clearest difference is update cadence: Co.din at every 3 weeks against BT21's every 10 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
BT21 ships an update every 10 months, Co.din every 3 weeks. The most recent releases landed on September 29, 2026 and September 18, 2026 respectively.
| Parameter | BT21 | Co.din |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 10 months | Every 3 weeks โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.4 โ better | 13.0 |
| Further details โ not scored | ||
| Size | 23 MB | 186 MB |
| Age rating | 4+ | 4+ |
| Developer | Thermogroup UK | NI PHARM TECH LIMITED |
In-app purchases
BT21
No in-app purchases
Co.din
No in-app purchases
Questions
Is BT21 free?
Is Co.din free?
Do BT21 or Co.din have ads?
Which is updated more often, BT21 or Co.din?
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