# Light Signals vs つくログ

The clearest difference is in-app purchases: つくログ at none against Light Signals's 1. つくログ also leads on ads (none vs shown) and iOS requirement (15.0 vs 26.1). Light Signals's advantage is update cadence (every 9 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Light Signals sells 1 one-off in-app purchase. つくログ asks for nothing beyond the download.

Light Signals ships an update every 9 days, つくログ every 3 weeks. The most recent releases landed on October 24, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Light Signals | つくログ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Size | 5 MB | 50 MB |
| Requires iOS | 26.1 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [MIZOU, CO., LTD.](https://appshunter.io/developer/1542553141) | [Koubo Guide sha Co.,Ltd.](https://appshunter.io/developer/1854492337) |

## What reviewers say

### Light Signals

[App page](https://appshunter.io/ios/app/light-signals-morse-code/id6756871661)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### つくログ

[App page](https://appshunter.io/ios/app/id6761753527)

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

**In-app purchases:** none


## Frequently asked questions

### Is Light Signals free?

Light Signals is free to download, with in-app purchases available.

### Is つくログ free?

つくログ is free to download, with no in-app purchases.

### Do Light Signals or つくログ have ads?

Light Signals shows ads; つくログ does not.

### Which is updated more often, Light Signals or つくログ?

Light Signals ships an update every 9 days, and つくログ every 3 weeks. Most recently, Light Signals was updated on October 24, 2026 and つくログ on October 8, 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.*