# Fast Compress vs Dialog AI

The clearest difference is in-app purchases: Fast Compress at none against Dialog AI's 2. Fast Compress also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.5). Dialog AI's advantage is update cadence (every 3 days vs every 2 months). On price and ads there is nothing between them.

Both are free to download. Dialog AI sells 2 in-app purchases, starting at $9.99 per month. Fast Compress asks for nothing beyond the download.

Fast Compress ships an update every 2 months, Dialog AI every 3 days. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fast Compress | Dialog AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fast-compress/id6742486158/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Ad-supported | — |
| Size | 60 MB | 10 MB |
| Requires iOS | **13.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [振鹏 钱](https://appshunter.io/developer/1571459870) | [FUDLJU TECHNOLOGY LIMITED](https://appshunter.io/developer/1766431334) |

## What reviewers say

### Fast Compress

[App page](https://appshunter.io/ios/app/fast-compress/id6742486158)

Optimize your device's storage with a powerful compression feature. This app efficiently manages and optimizes your media to free up valuable space.

**Highlights:** Space optimization, Media compression, Smart gallery management, Storage enhancement

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

**In-app purchases:** none


### Dialog AI

[App page](https://appshunter.io/ios/app/dialog-ai/id6747884043)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $9.99 | per month |
| Yearly | $99.99 | per year |


## Frequently asked questions

### Is Fast Compress free?

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

### Is Dialog AI free?

Dialog AI is free to download, with in-app purchases available.

### Do Fast Compress or Dialog AI have ads?

Both Fast Compress and Dialog AI show ads.

### Which is updated more often, Fast Compress or Dialog AI?

Fast Compress ships an update every 2 months, and Dialog AI every 3 days. Most recently, Fast Compress was updated on October 24, 2026 and Dialog AI on October 25, 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.*