Comparison

Flicker Fusion vs Retinal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

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Free

🔧 Utilities

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About

Flicker Fusion

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The Flicker Fusion administration application works in conjunction with the Lafayette Instrument Flicker Fusion system. The app allows an administrator to create/control a Critical Flicker Frequency (CFF) exam as well as store the results by examinee. The Flicker Fusion is for use in education and research and is not intended for medical or diagnostic purposes.

About

Retinal

Features

Read full description

Not all displays for Mac are well suited to display the user interface in a non-scaled resolution. A pixel density of about 110 pixels per inch (PPI) for non-Retina, and about 220 PPI for Retina is comfortable for most people. Use Retinal to work out the pixel density of any display.

Screenshots

Flicker Fusion4 screens

Retinal1 screens

Verdict

The call

The clearest difference is update cadence: Retinal at fortnightly against Flicker Fusion's every 4 months. Flicker Fusion's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Flicker Fusion ships an update every 4 months, Retinal fortnightly. The most recent releases landed on October 4, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 3 level

Flicker Fusion versus Retinal: the parameters behind the verdict, then further details
Parameter	Flicker Fusion	Retinal
Price	Free	Free
Update frequency	Every 4 months	Fortnightly — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod — better	iPhone
Requires iOS	15.0 — better	17.0
Further details — not scored
Size	18 MB	1 MB
Age rating	4+	4+
Developer	Lafayette Instrument Company, Inc.	Nico Rohrbach

In-app purchases

None

Flicker Fusion

No in-app purchases

None

Retinal

No in-app purchases

Questions

Is Flicker Fusion free?

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

Is Retinal free?

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

Do Flicker Fusion or Retinal have ads?

Neither Flicker Fusion nor Retinal shows ads.

Which is updated more often, Flicker Fusion or Retinal?

Flicker Fusion ships an update every 4 months, and Retinal fortnightly. Most recently, Flicker Fusion was updated on October 4, 2026 and Retinal on October 11, 2026.