# Katmer.im vs Aether

The clearest difference is device support: Aether at 3 against Katmer.im's 1. Aether also leads on iOS requirement (15.0 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Katmer.im ships an update every 10 days, Aether weekly. The most recent releases landed on October 7, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Katmer.im | Aether |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Size | 10 MB | 18 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arguman Yapay Zeka Teknolojileri Anonim Sirketi](https://appshunter.io/developer/1832189666) | [Critical Dynamics OU](https://appshunter.io/developer/330152929) |

## What reviewers say

### Katmer.im

[App page](https://appshunter.io/ios/app/katmerim/id6749801768)

**Features:** macOS Compatibility

**In-app purchases:** none


### Aether

[App page](https://appshunter.io/ios/app/aether-knowledge-engine/id6761418802)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Katmer.im free?

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

### Is Aether free?

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

### Do Katmer.im or Aether have ads?

Neither Katmer.im nor Aether shows ads.

### Which is updated more often, Katmer.im or Aether?

Katmer.im ships an update every 10 days, and Aether weekly. Most recently, Katmer.im was updated on October 7, 2026 and Aether on October 6, 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.*