# OBIS vs ABS Doku

The clearest difference is update cadence: ABS Doku at every 3 weeks against OBIS's every 3 months. 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.

OBIS ships an update every 3 months, ABS Doku every 3 weeks. The most recent releases landed on September 7, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | OBIS | ABS Doku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 2 MB | 46 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [wissenswerft GmbH](https://appshunter.io/developer/516502110) | [ABS Safety GmbH](https://appshunter.io/developer/1481441714) |

## What reviewers say

### OBIS

[App page](https://appshunter.io/ios/app/obis/id1349700954)

**Features:** macOS Compatibility

**In-app purchases:** none


### ABS Doku

[App page](https://appshunter.io/ios/app/abs-doku/id1481441715)

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

**In-app purchases:** none


## Frequently asked questions

### Is OBIS free?

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

### Is ABS Doku free?

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

### Do OBIS or ABS Doku have ads?

Neither OBIS nor ABS Doku shows ads.

### Which is updated more often, OBIS or ABS Doku?

OBIS ships an update every 3 months, and ABS Doku every 3 weeks. Most recently, OBIS was updated on September 7, 2026 and ABS Doku on September 14, 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.*