# 買い忘れ物防止！（忘れ物防止リマインダー） vs flat

The clearest difference is in-app purchases: flat at none against 買い忘れ物防止！（忘れ物防止リマインダー）'s 4. flat also leads on ads (none vs shown) and iOS requirement (12.1 vs 15.6). 買い忘れ物防止！（忘れ物防止リマインダー）'s advantage is update cadence (every 6 weeks vs every 6 months). On price and device support there is nothing between them.

Both are free to download. 買い忘れ物防止！（忘れ物防止リマインダー） sells 4 one-off in-app purchases. flat asks for nothing beyond the download.

買い忘れ物防止！（忘れ物防止リマインダー） ships an update every 6 weeks, flat every 6 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | 買い忘れ物防止！（忘れ物防止リマインダー） | flat |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 80.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Size | 58 MB | 17 MB |
| Requires iOS | 15.6 | **12.1** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [hidehiko aihara](https://appshunter.io/developer/1178520609) | [Agali Inc.](https://appshunter.io/developer/1164858378) |

## What reviewers say

### 買い忘れ物防止！（忘れ物防止リマインダー）

[App page](https://appshunter.io/ios/app/id1282909212)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee (Regular) | $0.49 | one-time |
| 開発者応援募金 | $1.99 | one-time |
| Coffee (Large) | $1.99 | one-time |
| Cake Set | $5.99 | one-time |


### flat

[App page](https://appshunter.io/ios/app/flat-sightseeingtraveltours/id1572217108)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 買い忘れ物防止！（忘れ物防止リマインダー） free?

買い忘れ物防止！（忘れ物防止リマインダー） is free to download, with in-app purchases available.

### Is flat free?

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

### Do 買い忘れ物防止！（忘れ物防止リマインダー） or flat have ads?

買い忘れ物防止！（忘れ物防止リマインダー） shows ads; flat does not.

### Which is updated more often, 買い忘れ物防止！（忘れ物防止リマインダー） or flat?

買い忘れ物防止！（忘れ物防止リマインダー） ships an update every 6 weeks, and flat every 6 months. Most recently, 買い忘れ物防止！（忘れ物防止リマインダー） was updated on November 3, 2026 and flat on November 3, 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.*