# RetigoApp vs Tech English for Developers

The clearest difference is in-app purchases: RetigoApp at none against Tech English for Developers's 1. RetigoApp also leads on iOS requirement (9.0 vs 16.6). Tech English for Developers's advantage is update cadence (every 5 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Tech English for Developers sells 1 one-off in-app purchase. RetigoApp asks for nothing beyond the download.

RetigoApp ships an update every 4 months, Tech English for Developers every 5 days. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | RetigoApp | Tech English for Developers |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 336 MB | 59 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Retigo](https://appshunter.io/developer/1806839633) | [katsuya tamai](https://appshunter.io/developer/1504443936) |

## What reviewers say

### RetigoApp

[App page](https://appshunter.io/ios/app/retigoapp/id1569013914)

**Features:** macOS Compatibility

**In-app purchases:** none


### Tech English for Developers

[App page](https://appshunter.io/ios/app/tech-english-for-developers/id6742486115)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示（買い切り） | $1.99 | one-time |


## Frequently asked questions

### Is RetigoApp free?

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

### Is Tech English for Developers free?

Tech English for Developers is free to download, with in-app purchases available.

### Do RetigoApp or Tech English for Developers have ads?

Neither RetigoApp nor Tech English for Developers shows ads.

### Which is updated more often, RetigoApp or Tech English for Developers?

RetigoApp ships an update every 4 months, and Tech English for Developers every 5 days. Most recently, RetigoApp was updated on October 10, 2026 and Tech English for Developers on September 30, 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.*