# Robo Flags. vs 英語勉強

The clearest difference is price: Robo Flags. at Free against 英語勉強's $0.99. Robo Flags. also leads on update cadence (every 4 months vs every 38 months). 英語勉強's advantage is ads (none vs shown) and iOS requirement (9.0 vs 15.0). On in-app purchases and device support there is nothing between them.

Robo Flags. is free to download; 英語勉強 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Robo Flags. ships an update every 4 months, 英語勉強 every 38 months. The most recent releases landed on October 2, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Robo Flags. | 英語勉強 |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 months** | Every 38 months |
| Size | 59 MB | 13 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [Junpei Shimotsu](https://appshunter.io/developer/882299124) |

## What reviewers say

### Robo Flags.

[App page](https://appshunter.io/ios/app/robo-flags/id675525282)

**Features:** Vision Pro support

**In-app purchases:** none


### 英語勉強

[App page](https://appshunter.io/ios/app/id1466197847)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Robo Flags. free?

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

### Is 英語勉強 free?

英語勉強 costs $0.99, with no in-app purchases.

### Do Robo Flags. or 英語勉強 have ads?

Robo Flags. shows ads; 英語勉強 does not.

### Which is updated more often, Robo Flags. or 英語勉強?

Robo Flags. ships an update every 4 months, and 英語勉強 every 38 months. Most recently, Robo Flags. was updated on October 2, 2026 and 英語勉強 on October 15, 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.*