# CSAE App vs AESIS 2025

The clearest difference is iOS requirement: AESIS 2025 at 12.0 against CSAE App's 17.0. 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.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | CSAE App | AESIS 2025 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Size | 61 MB | 70 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [University of Oxford](https://appshunter.io/developer/688778837) | [vFairs LLC](https://appshunter.io/developer/1349888986) |

## What reviewers say

### CSAE App

[App page](https://appshunter.io/ios/app/csae-app/id1499544192)

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

**In-app purchases:** none


### AESIS 2025

[App page](https://appshunter.io/ios/app/aesis-2025/id6737989894)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CSAE App free?

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

### Is AESIS 2025 free?

AESIS 2025 is free to download, with no in-app purchases.

### Do CSAE App or AESIS 2025 have ads?

Neither CSAE App nor AESIS 2025 shows ads.

### Which is updated more often, CSAE App or AESIS 2025?

CSAE App ships an update every 5 months, and AESIS 2025 every 5 months. Most recently, CSAE App was updated on September 18, 2026 and AESIS 2025 on September 17, 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.*