# Robo Flags. vs Card Memory for study

The clearest difference is in-app purchases: Robo Flags. at none against Card Memory for study's 1. Robo Flags. also leads on iOS requirement (15.0 vs 18.5). Card Memory for study's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Card Memory for study sells 1 one-off in-app purchase. Robo Flags. asks for nothing beyond the download.

## The numbers

| Metric | Robo Flags. | Card Memory for study |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | — |
| Size | 59 MB | 10 MB |
| Requires iOS | **15.0** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [Mamiko Tsukamoto](https://appshunter.io/developer/1837855636) |

## What reviewers say

### Robo Flags.

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

**Features:** Vision Pro support

**In-app purchases:** none


### Card Memory for study

[App page](https://appshunter.io/ios/app/card-memory-for-study/id6752864823)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro Features | $1.99 | one-time |


## Frequently asked questions

### Is Robo Flags. free?

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

### Is Card Memory for study free?

Card Memory for study is free to download, with in-app purchases available.

### Do Robo Flags. or Card Memory for study have ads?

Robo Flags. shows ads; Card Memory for study does not.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*