# Flicker Fusion vs FlickerSpec

The clearest difference is in-app purchases: Flicker Fusion at none against FlickerSpec's 1. Flicker Fusion also leads on device support (3 vs 1) and iOS requirement (15.0 vs 26.0). FlickerSpec's advantage is update cadence (every 4 weeks vs every 4 months). On price and ads there is nothing between them.

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

Flicker Fusion ships an update every 4 months, FlickerSpec every 4 weeks. The most recent releases landed on October 4, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Flicker Fusion | FlickerSpec |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 weeks** |
| Size | 18 MB | 12 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lafayette Instrument Company, Inc.](https://appshunter.io/developer/335029582) | [Corey Thomas Slick](https://appshunter.io/developer/1818871667) |

## What reviewers say

### Flicker Fusion

[App page](https://appshunter.io/ios/app/flicker-fusion/id1471020622)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Flicker Fusion free?

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

### Is FlickerSpec free?

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

### Do Flicker Fusion or FlickerSpec have ads?

Neither Flicker Fusion nor FlickerSpec shows ads.

### Which is updated more often, Flicker Fusion or FlickerSpec?

Flicker Fusion ships an update every 4 months, and FlickerSpec every 4 weeks. Most recently, Flicker Fusion was updated on October 4, 2026 and FlickerSpec 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.*