ARadar vs Trek Accessories
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ARadar
Enhance your cycling safety by connecting compatible radar devices directly to your Apple Watch. Receive vibration and audio alerts for approaching objects, view ride statistics, and sync workout data to health apps.
- Direct Apple Watch radar connection
- Vibration and audio alerts
- Overtaking statistics
- Health App and Strava sync
- Cadence sensor auto-connection
- Mirror view on iPhone
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Improve your safety with the ARadar app! Connect your Garmin Varia™ (only models with bluetooth!) to your Apple Watch directly without using iPhone or any other Garmin device (no needs for a Garmin Watch or a Garmin cyclocomputer anymore!) It's the perfect companion for every bike commuter! Also Bryton Gardia R300 is compatible! Added also eRTL615 It will vibrate and ring the Apple Watch when an object is approaching and you can have also Voice Feedback! You will see also statistics about overtaking during the ride! The app also save workouts (heart rate and gps information) to Health App and Strava! Other features: - Cadence sensor auto connection supported - Mirror view on your iphone ARadar is not affiliated with or endorsed by any subscription service or maker of exercise equipment.
Trek Accessories
Enhance your cycling safety with advanced alerts and real-time vehicle detection. This app provides visual and audible warnings for approaching vehicles, helping you stay aware of your surroundings and prepare for passes. It also allows remote control of your connected bike light for increased visibility.
- Real-time vehicle detection
- Audible and visual alerts
- Distance and side-to-side positioning
- Remote bike light control
- Daytime running light activation
- Adjustable alert settings
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The Trek Accessories App adds additional functionality to the Trek CarBack Radar Rear Bike Light by giving cyclists advanced alerts and a real-time visual depiction of rear approaching detected vehicles. Helps you see cars. Use the Trek Accessories App to receive visual and audible alerts of detected rear approaching vehicles. The Trek Accessories App and Trek CarBack Radar can detect rear approaching vehicles from up to 240M, with vehicles first appearing with an audible beep and a visual indicator at the bottom of the App screen. Once the detected vehicle approaches to within 150M, the vehicle is shown on screen in real time. Once within 75M the Vehicles location is depicted in both distance behind and distance to either side, indicating preparation for a potential pass. Once the vehicle completes a pass, an audible alert indicates the pass and the vehicle drops off the screen. Helps cars see you. The Trek Accessories App also gives the ability to turn on a connected Trek CarBack Rear bike Light, all from the App screen. The CarBack Radar offers Daytime Running Light Performance that can be seen from up to 2km during the day to help a cyclist be more visible on the road. Audible and Visual Alerts You can choose the best way to receive alerts – Alerts will be shown visually on screen as well as an audio alert when a detected rear approaching vehicle is first detected, and again when it passes. You can choose to turn audible alerts on and off. This allows you to use the app the way you ride – either with a phone mounted on your bike’s handlebars, or stowed in a jersey pocket. *Please note that the Trek Accessories App currently only works with Trek CarBack Radar Rear Bike Lights. Learn more about Trek CarBack Radar Rear Bike light here - https://www.trekbikes.com/us/en_US/carback/ Find Trek Accessories App FAQs here - https://www.trekbikes.com/us/en_US/FAQ/trek-carback-radar-rear-bike-light/ Having trouble? Contact our support team for assistance at RiderSupport@Trekbikes.com
Screenshots
Verdict
The clearest difference is price: Trek Accessories at Free against ARadar's $5.99. Trek Accessories also leads on rating (4.7 vs 4.4). ARadar's advantage is review sentiment (72% vs 36%) and update cadence (every 3 weeks vs every 3 months). On ratings volume, ads, in-app purchases and monetization model 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
Trek Accessories is free to download; ARadar costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trek Accessories holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 78 and 203 respectively. Written reviews complicate that: 72% of ARadar's written reviews are positive against 36% of Trek Accessories's, so the app with the better star average is not the one people write more warmly about.
ARadar ships an update every 3 weeks, Trek Accessories every 3 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | ARadar | Trek Accessories |
|---|---|---|
| Price | $5.99 | Free — better |
| Rating | 4.4 (78 ratings) | 4.7 (203 ratings) — better |
| Positive reviews | 72.3% of reviews — better | 36.4% of reviews |
| Number of ratings | 78 | 203 — better |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #30 — better | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone |
| Requires iOS | 15.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Roberto Viola | Trek Bicycle |
Customer experience
ARadar
Trek Accessories
In-app purchases
ARadar
No in-app purchases
Trek Accessories
No in-app purchases








