Comparison

ACV Viper vs Rey

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

Head to head
About

ACV Viper

Features
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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.

About

Rey

Features
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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

ACV Viper4 screens
Rey4 screens

Verdict

The call

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

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

ACV Viper ships an update fortnightly, Rey every 3 weeks. The most recent releases landed on November 4, 2026 and November 12, 2026 respectively.

Scorecard1 real difference ยท 5 level
ACV Viper versus Rey: the parameters behind the verdict, then further details
ParameterACV ViperRey
PriceFreeFree
Update frequencyFortnightly โ€” betterEvery 3 weeks
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size190 MB40 MB
Age rating4+4+
DeveloperACV Auctions IncLofi GmbH

In-app purchases

None

ACV Viper

No in-app purchases

None

Rey

No in-app purchases

Questions

Is ACV Viper free?
ACV Viper is free to download, with no in-app purchases.
Is Rey free?
Rey is free to download, with no in-app purchases.
Do ACV Viper or Rey have ads?
Neither ACV Viper nor Rey shows ads.
Which is updated more often, ACV Viper or Rey?
ACV Viper ships an update fortnightly, and Rey every 3 weeks. Most recently, ACV Viper was updated on November 4, 2026 and Rey on November 12, 2026.

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