Comparison

BT21 vs Co.din

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

BT21

Features
Read full description

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.

About

Co.din

Features
Read full description

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

BT213 screens
Co.din4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard1 real difference ยท 5 level
BT21 versus Co.din: the parameters behind the verdict, then further details
ParameterBT21Co.din
PriceFreeFree
Update frequencyEvery 10 monthsEvery 3 weeks โ€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS12.4 โ€” better13.0
Further details โ€” not scored
Size23 MB186 MB
Age rating4+4+
DeveloperThermogroup UKNI PHARM TECH LIMITED

In-app purchases

None

BT21

No in-app purchases

None

Co.din

No in-app purchases

Questions

Is BT21 free?
BT21 is free to download, with no in-app purchases.
Is Co.din free?
Co.din is free to download, with no in-app purchases.
Do BT21 or Co.din have ads?
Neither BT21 nor Co.din shows ads.
Which is updated more often, BT21 or Co.din?
BT21 ships an update every 10 months, and Co.din every 3 weeks. Most recently, BT21 was updated on September 29, 2026 and Co.din on September 18, 2026.

Other comparisons