# 日付計算 vs ロック画面メモ

The clearest difference is price: ロック画面メモ at Free against 日付計算's $0.99. ロック画面メモ also leads on in-app purchases (none vs 1) and update cadence (every 5 days vs every 4 months). On ads, device support and iOS requirement there is nothing between them.

ロック画面メモ is free to download; 日付計算 costs $0.99 up front. 日付計算 sells 1 one-off in-app purchase. ロック画面メモ asks for nothing beyond the download.

日付計算 ships an update every 4 months, ロック画面メモ every 5 days. The most recent releases landed on November 10, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 日付計算 | ロック画面メモ |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Size | 10 MB | 7 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SMART BIT K.K](https://appshunter.io/developer/1896559487) | [CapCat LLC](https://appshunter.io/developer/1654095841) |

## What reviewers say

### 日付計算

[App page](https://appshunter.io/ios/app/id6776508989)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 全機能アンロック | $2.99 | one-time |


### ロック画面メモ

[App page](https://appshunter.io/ios/app/lockscreenmemo/id6787902681)

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

**In-app purchases:** none


## Frequently asked questions

### Is 日付計算 free?

日付計算 costs $0.99, and also offers in-app purchases.

### Is ロック画面メモ free?

ロック画面メモ is free to download, with no in-app purchases.

### Do 日付計算 or ロック画面メモ have ads?

Neither 日付計算 nor ロック画面メモ shows ads.

### Which is updated more often, 日付計算 or ロック画面メモ?

日付計算 ships an update every 4 months, and ロック画面メモ every 5 days. Most recently, 日付計算 was updated on November 10, 2026 and ロック画面メモ on October 31, 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.*