# Aether vs Tacitus Mail

The clearest difference is in-app purchases: Aether at none against Tacitus Mail's 2. Aether also leads on update cadence (weekly vs fortnightly) and iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Tacitus Mail sells 2 in-app purchases, starting at $5.99 per month. Aether asks for nothing beyond the download.

Aether ships an update weekly, Tacitus Mail fortnightly. The most recent releases landed on October 6, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Aether | Tacitus Mail |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Size | 18 MB | 7 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 17+ |
| Developer | [Critical Dynamics OU](https://appshunter.io/developer/330152929) | [Docs Printing SRL](https://appshunter.io/developer/1034316493) |

## What reviewers say

### Aether

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Tacitus Mail

[App page](https://appshunter.io/ios/app/tacitus-mail/id6762024307)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus | $5.99 | per month |
| Unlimited account | $12.99 | per month |


## Frequently asked questions

### Is Aether free?

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

### Is Tacitus Mail free?

Tacitus Mail is free to download, with in-app purchases available.

### Do Aether or Tacitus Mail have ads?

Neither Aether nor Tacitus Mail shows ads.

### Which is updated more often, Aether or Tacitus Mail?

Aether ships an update weekly, and Tacitus Mail fortnightly. Most recently, Aether was updated on October 6, 2026 and Tacitus Mail on October 2, 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.*