# Flicker Fusion vs StimuliApp

The clearest difference is update cadence: StimuliApp at every 6 weeks against Flicker Fusion's every 4 months. StimuliApp also leads on iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Flicker Fusion ships an update every 4 months, StimuliApp every 6 weeks. The most recent releases landed on October 4, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Flicker Fusion | StimuliApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/stimuliapp/id1497026540/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 18 MB | 10 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lafayette Instrument Company, Inc.](https://appshunter.io/developer/335029582) | [Rafael Marin Campos](https://appshunter.io/developer/1497026539) |

## What reviewers say

### Flicker Fusion

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

**In-app purchases:** none


### StimuliApp

[App page](https://appshunter.io/ios/app/stimuliapp/id1497026540)

Create precise psychophysical tests on iOS devices without programming. Assess perceptual capabilities using various stimuli like images, sounds, and videos with synchronized visual and auditory output. Features include real-time preview and automatic report generation.

**Highlights:** Precise timing with Metal framework, 60 or 120 Hz test options, Synchronized visual and auditory stimulation, Interactive stimulus creation with preview, Automatic report generation, Gamma-correction features

**In-app purchases:** none


## Frequently asked questions

### Is Flicker Fusion free?

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

### Is StimuliApp free?

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

### Do Flicker Fusion or StimuliApp have ads?

Neither Flicker Fusion nor StimuliApp shows ads.

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

Flicker Fusion ships an update every 4 months, and StimuliApp every 6 weeks. Most recently, Flicker Fusion was updated on October 4, 2026 and StimuliApp on October 29, 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.*