# ACV Viper vs Speedometer XS

The clearest difference is update cadence: Speedometer XS at every 5 days against ACV Viper's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

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

ACV Viper ships an update fortnightly, Speedometer XS every 5 days. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | ACV Viper | Speedometer XS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/speedometer-xs/id6708236999/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | — | Free |
| Size | 190 MB | 6 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ACV Auctions Inc](https://appshunter.io/developer/969808942) | [永超 侯](https://appshunter.io/developer/906391544) |

## What reviewers say

### ACV Viper

[App page](https://appshunter.io/ios/app/acv-viper/id6476239640)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Speedometer XS

[App page](https://appshunter.io/ios/app/speedometer-xs/id6708236999)

Track your real-time speed, distance, and altitude during various activities like running, cycling, or driving. Record and analyze your measurements to monitor progress and identify areas for improvement.

**Highlights:** Real-time speed measurement, Track distance traveled, Record altitude, Save measurement history, Analyze performance data, User-friendly interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ACV Viper free?

ACV Viper is free to download, with no in-app purchases.

### Is Speedometer XS free?

Speedometer XS is free to download, with no in-app purchases.

### Do ACV Viper or Speedometer XS have ads?

Neither ACV Viper nor Speedometer XS shows ads.

### Which is updated more often, ACV Viper or Speedometer XS?

ACV Viper ships an update fortnightly, and Speedometer XS every 5 days. Most recently, ACV Viper was updated on November 4, 2026 and Speedometer XS on October 30, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*