# ATAS vs Echo EFB

The clearest difference is update cadence: ATAS at every 3 weeks against Echo EFB's every 3 months. ATAS also leads on iOS requirement (12.0 vs 16.0). 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.

ATAS ships an update every 3 weeks, Echo EFB every 3 months. The most recent releases landed on September 17, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | ATAS | Echo EFB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Size | 62 MB | 19 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [鹤 黄](https://appshunter.io/developer/1494668513) | [从哲 黄](https://appshunter.io/developer/1895937784) |

## What reviewers say

### ATAS

[App page](https://appshunter.io/ios/app/atas/id1573862672)

**Features:** macOS Compatibility

**In-app purchases:** none


### Echo EFB

[App page](https://appshunter.io/ios/app/echo-efb/id6772218047)

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

**In-app purchases:** none


## Frequently asked questions

### Is ATAS free?

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

### Is Echo EFB free?

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

### Do ATAS or Echo EFB have ads?

Neither ATAS nor Echo EFB shows ads.

### Which is updated more often, ATAS or Echo EFB?

ATAS ships an update every 3 weeks, and Echo EFB every 3 months. Most recently, ATAS was updated on September 17, 2026 and Echo EFB on September 21, 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.*