# FlickerSpec vs Drift Diary

The clearest difference is in-app purchases: Drift Diary at none against FlickerSpec's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. FlickerSpec sells 1 one-off in-app purchase. Drift Diary asks for nothing beyond the download.

FlickerSpec ships an update every 4 weeks, Drift Diary monthly. Both last shipped on October 13, 2026.

## The numbers

| Metric | FlickerSpec | Drift Diary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Monthly |
| Size | 12 MB | 8 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Corey Thomas Slick](https://appshunter.io/developer/1818871667) | [Hirokazu Kurokawa](https://appshunter.io/developer/463196366) |

## What reviewers say

### FlickerSpec

[App page](https://appshunter.io/ios/app/flickerspec-led-flicker-test/id6759629660)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FlickerSpec Pro | $49.99 | one-time |


### Drift Diary

[App page](https://appshunter.io/ios/app/drift-diary/id6761289603)

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

**In-app purchases:** none


## Frequently asked questions

### Is FlickerSpec free?

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

### Is Drift Diary free?

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

### Do FlickerSpec or Drift Diary have ads?

Neither FlickerSpec nor Drift Diary shows ads.

### Which is updated more often, FlickerSpec or Drift Diary?

FlickerSpec ships an update every 4 weeks, and Drift Diary monthly. Most recently, FlickerSpec was updated on October 13, 2026 and Drift Diary on October 13, 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.*