Comparison

Lensit vs Retinal

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

Head to head

Lens Calculator

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About

Lensit

Features

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Get the exact lens and throw distance for your next projection setup — instantly. Lensit does the projection math for you: • Enter your screen size and distance to find the right lens • Or enter your lens spec to find the ideal distance • Switch between 4:3 and 16:9 aspect ratio • Works in metric or imperial — or use it to convert between them Built for AV techs, event producers, and anyone setting up a projector who doesn't want to do the math by hand.

About

Retinal

Features

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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

Lensit1 screens

Retinal1 screens

Verdict

The call

Lensit and Retinal are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

Lensit ships an update every 3 weeks, Retinal fortnightly. The most recent releases landed on September 14, 2026 and October 11, 2026 respectively.

ScorecardNo meaningful differences

Lensit versus Retinal: the parameters behind the verdict, then further details
Parameter	Lensit	Retinal
Price	Free	Free
Update frequency	Every 3 weeks	Fortnightly — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad — better	iPhone
Requires iOS	16.4 — better	17.0
Further details — not scored
Size	49 MB	1 MB
Age rating	4+	4+
Developer	lior cohen	Nico Rohrbach

In-app purchases

None

Lensit

No in-app purchases

None

Retinal

No in-app purchases

Questions

Is Lensit free?

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

Is Retinal free?

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

Do Lensit or Retinal have ads?

Neither Lensit nor Retinal shows ads.

Which is updated more often, Lensit or Retinal?

Lensit ships an update every 3 weeks, and Retinal fortnightly. Most recently, Lensit was updated on September 14, 2026 and Retinal on October 11, 2026.