# Avtolog vs Clausius BT

The clearest difference is update cadence: Avtolog at every 3 weeks against Clausius BT's every 2 months. Avtolog also leads on iOS requirement (9.0 vs 13.0). 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.

Avtolog ships an update every 3 weeks, Clausius BT every 2 months. The most recent releases landed on October 8, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Avtolog | Clausius BT |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 71 MB | 21 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AMZS](https://appshunter.io/developer/1079441076) | [SELTRON d.o.o.](https://appshunter.io/developer/894504883) |

## What reviewers say

### Avtolog

[App page](https://appshunter.io/ios/app/avtolog/id1534217543)

**In-app purchases:** none


### Clausius BT

[App page](https://appshunter.io/ios/app/clausius-bt/id1599744081)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Avtolog free?

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

### Is Clausius BT free?

Clausius BT is free to download, with no in-app purchases.

### Do Avtolog or Clausius BT have ads?

Neither Avtolog nor Clausius BT shows ads.

### Which is updated more often, Avtolog or Clausius BT?

Avtolog ships an update every 3 weeks, and Clausius BT every 2 months. Most recently, Avtolog was updated on October 8, 2026 and Clausius BT on October 5, 2026.

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