Comparison

Stop Calculator vs Flicker Safe

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

Head to head
About

Stop Calculator

This tool helps filmmakers quickly compare exposure settings between two cameras. It calculates precise stop differences in real-time, ensuring your shots are perfectly exposed and matched across different setups. Simplify your workflow and eliminate guesswork.

Highlights
  • Compare ISO, t-stop, shutter angle, and FPS
  • Real-time stop difference calculation
  • Intuitive interface for filmmakers
  • Exposure feedback for underexposed/overexposed shots
Features
Read full description

Easily compare exposure settings between two cameras and get instant feedback on exposure differences. Whether you’re working with multiple cameras or trying to match your settings across different setups, Stop Calc simplifies the process by calculating precise stop differences in exposure. No more guessing—quickly find out if your settings are underexposed or overexposed and make informed decisions to get perfect shots every time. Key features: - Compare ISO, t-stop, shutter angle, and FPS between two cameras - Get accurate stop differences in real-time - Simple, intuitive interface designed for filmmakers Perfect for cinematographers, videographers, and anyone who needs precise exposure matching across different cameras.

About

Flicker Safe

Features
Read full description

FlickerSafe is a camera-based LED flicker tester for filmmakers, photographers, streamers, and event crews. Point your iPhone at a light to see its flicker frequency, modulation, and camera risk before you shoot. Use FlickerSafe when scouting venues, setting up a home studio, comparing LED panels, checking dimmer levels, or preparing a shoot where lighting needs to stay camera-safe. Key features: - Estimate dominant flicker frequency from camera luminance samples - Measure modulation depth and camera risk - Check common shutter speeds such as 1/50, 1/60, 1/100, and 1/120 - Get safer shutter-speed suggestions for the detected light - Save fixture measurements and history for later reference - Export production reports with FlickerSafe Pro FlickerSafe is designed as a practical field tool, not a laboratory instrument. Results depend on device camera capabilities, ambient light, fixture brightness, and how steadily the phone is held during capture.

Screenshots

Stop Calculator1 screens
Flicker Safe4 screens

Verdict

The call

The clearest difference is price: Flicker Safe at Free against Stop Calculator's $0.99. Stop Calculator's advantage is in-app purchases (none vs 1) and update cadence (every 2 days vs every 3 weeks). On ads 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

Flicker Safe is free to download; Stop Calculator costs $0.99 up front. Flicker Safe sells 1 one-off in-app purchase. Stop Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Stop Calculator ships an update every 2 days, Flicker Safe every 3 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
Stop Calculator versus Flicker Safe: the parameters behind the verdict, then further details
ParameterStop CalculatorFlicker Safe
Price$0.99Free — better
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 2 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better17.0
Further details — not scored
Size1 MB2 MB
Age rating4+4+
Developereric HernandezJan Sokol

In-app purchases

None

Stop Calculator

No in-app purchases

1 purchases

Flicker Safe

One-time1
  • FlickerSafe Pro$6.99

Questions

Is Stop Calculator free?
Stop Calculator costs $0.99, with no in-app purchases.
Is Flicker Safe free?
Flicker Safe is free to download, with in-app purchases available.
Do Stop Calculator or Flicker Safe have ads?
Neither Stop Calculator nor Flicker Safe shows ads.
Which is updated more often, Stop Calculator or Flicker Safe?
Stop Calculator ships an update every 2 days, and Flicker Safe every 3 weeks. Most recently, Stop Calculator was updated on October 10, 2026 and Flicker Safe on September 30, 2026.

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