ACV Viper vs Rey
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
ACV Viper
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ACV Viper is the culmination of inspection tools and machine learning capabilities at ACV Auctions, car inspections, marketplace. These are packaged into a single platform as a dealer appraisal and inventory assessment tool. Our goal is to bring these technological advancements into the hands of dealers and industry professionals, allowing them to capture a wide array of vehicle information with the support of machine learning. This results in the most comprehensive suite of vehicle assessment capabilities in the industry.
Rey
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The official mobile companion app for viewing and testing mobile apps built with Rey, a platform for building mobile apps visually. Test your mobile apps instantly on your phone as you build them on the web. See your designs come to life on your device in real-time. Instant Preview: Design on the web and see changes appear immediately on your phone. Iterate faster by testing interactions, layouts, and user flows on actual iOS devices. Real Device Testing: Experience your app exactly as your users will, with native performance, accurate touch responses, and true-to-life screen dimensions. If you have any questions, please reach out to us at hello@reyapp.io. Links Privacy Policy: https://reyapp.io/privacy Terms of Service: https://reyapp.io/terms
Screenshots
Verdict
The clearest difference is iOS requirement: Rey at 15.0 against ACV Viper's 17.0. On price, update cadence, ads and in-app purchases 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.
ACV Viper ships an update fortnightly, Rey every 3 weeks. The most recent releases landed on November 4, 2026 and November 12, 2026 respectively.
| Parameter | ACV Viper | Rey |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly โ better | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 17.0 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 190 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | ACV Auctions Inc | Lofi GmbH |
In-app purchases
ACV Viper
No in-app purchases
Rey
No in-app purchases









