FLICKERfree Calculator vs pCAM Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FLICKERfree Calculator
This tool helps cinematographers calculate precise camera speeds and shutter angles for flicker-free film or digital recording. It's particularly useful with HMI or fluorescent lighting, offering instant calculations for 50 Hz or 60 Hz frequencies.
- Calculate camera speed (fps)
- Calculate shutter angle (degrees)
- Selectable line frequency (50/60 Hz)
- Instant calculations
- Finger slider for value selection
- Includes reference card images
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The Cinematography Electronics FLICKERfree Calculator is a handy tool to calculate the proper camera speed and shutter angle combinations for FLICKERfree film or digital cinematography. It is especially useful when using HMI or fluorescent lighting. Our FLICKERfree Calculator is designed with the same simplicity as our popular HMI Flickerfree Filming Speeds reference cards. Our App calculates the camera speed in Frames Per Second (fps) and camera Shutter Angle in Degrees. The colors on the calculator, Burgundy (50 Hz) or Blue (60 Hz), also match the colors on our reference cards. Features: * Easy to use with an attractive interface. * Selectable Line Frequency, either 50 Hz or 60 Hz. * Calculates the camera speed in Frames Per Second (fps). * Calculates the camera Shutter Angle in Degrees. * Calculates instantly when an entry is changed. * A finger slider allows user to select the Frames Per Second or Shutter Angle values. * Images of our HMI Flickerfree Filming Speeds reference cards are included. * Optimized for the iPhone 4 Retina screen. HMI Flickerfree Filming Speeds reference cards © 1986 - 2013 Cinematography Electronics Inc.
pCAM Pro
This app provides 27 essential tools for cinematography and photography professionals and students. It offers instant calculations for depth of field, field of view, exposure, and more, with a user-friendly interface designed for on-the-go use.
- Depth of Field calculations
- Field of View preview
- Focal Length matching
- Exposure calculations
- HMI Flicker-free settings
- Speed Booster adapter calculations
- VFX tracking markers
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Plan shots, choose lenses, calculate exposure, and pre-visualize the frame in seconds. 27 pro tools. Every result illustrated. 2,000+ camera formats plus unlimited user-defined formats. I've deliberately kept pCAM Pro a one-time purchase, with none of the subscriptions that have crept into so many apps. • Universal app for iPhone, iPad, Apple Silicon Mac, and Apple Vision Pro • Depth of Field (hyperfocal, total depth, near and far, image circle) • Field of View (and angle of view) • Field of View Preview in both Portrait & Landscape camera positions (8 images to pre-visualize & size shots by distance & focal length) • Focal Length (lens) Matching — match to horizontal, vertical, or diagonal dimensions • Relative Size (compares sensors) • Exposure calculations • HMI Flicker-free (safe shutters & safe camera speeds) • Reference (technical charts, lists & tables. Cine film stocks with film can labels, cine lens specs, false color/exposure change, diopter distance table, miniature shooting, safe panning speeds, zone system) • Insert Slate (4 font colors plus white or black backgrounds) • Splits — Aperture Finder calculation • Speed Booster® Adapter — calculate reduced Focal Length & Boosted Aperture with various adapters. Also create camera format profiles with attached adapters for use in other tools • Eye Light (soft-edged light shapes — Full Screen, Oval, Ring, and Strip) • Chroma Key & VFX Tracking (green and blue screen and VFX tracking markers) • Light Effects for handheld light or via Apple AirPlay to HDTV. Includes templates for: fire, television, siren, neon, strobe, flashbulb, lightning. Create unlimited custom animations • Mired Shift — Gel Selector • Conversion calculator • 4 Test Charts (incl. Siemens Star) • Triangulate calculation (calculate distances, image circle, etc.) • Film Running Time to Length • Shooting to Screen Time • Color Correction (chooses color correction filters) • Time Lapse (shooting interval, event duration, screen time) • Scene Illumination (beam intensity) • Light Coverage (width/distance) • Underwater Distance • Diopter (lens focus, diopter power) • Macro (object distance, magnification, corrected stop, DoF, object size, image size, fill percentage) • Built-in user guides on each screen • Calculates instantly & automatically as each entry is entered • 2,000+ camera formats plus unlimited customizable, user-defined camera formats, CoC & filters • Designed by a working camera technician who understands that calculations must be done simply and on-the-run AND ONE THING THAT ISN'T A CALCULATOR Crew Wheel — spin to settle who's buying the coffee. Not a tool, just a small gift for the standing-around time. Every long day needs one. TRUSTED WORLDWIDE BY DPs, Photographers, Camera Assistants, Camera Operators, Production Designers, VFX, Videographers, Gaffers, plus Film, Television, and Digital Media students. INDUSTRY RECOGNITION • Membership in the Academy of Motion Picture Arts and Sciences (Production and Technology Branch). • 75th Primetime Emmy Awards — Emmy® for "Outstanding Achievement in Engineering, Science & Technology" from the Academy of Television Arts & Sciences. • 62nd Primetime Emmy Awards — Engineering Plaque for "Outstanding Achievement in Engineering Development" from the Academy of Television Arts & Sciences. • Technical Achievement Award from Society of Camera Operators — "For outstanding contributions to cinematography through the design and development of the pCAM Film+Digital Calculator."
Screenshots
Verdict
The clearest difference is price: FLICKERfree Calculator at Free against pCAM Pro's $34.99. FLICKERfree Calculator also leads on in-app purchases (none vs 3) and iOS requirement (11.0 vs 17.0). pCAM Pro's advantage is ratings volume (222 vs 6) and update cadence (weekly vs monthly). On ads and device support 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
FLICKERfree Calculator is free to download; pCAM Pro costs $34.99 up front. pCAM Pro sells 3 one-off in-app purchases. FLICKERfree Calculator asks for nothing beyond the download.
pCAM Pro holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: pCAM Pro has 222 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 86% of FLICKERfree Calculator's written reviews are positive against 97% of pCAM Pro's.
FLICKERfree Calculator ships an update monthly, pCAM Pro weekly. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.
| Parameter | FLICKERfree Calculator | pCAM Pro |
|---|---|---|
| Price | Free — better | $34.99 |
| Rating | 4.7 (6 ratings) | 4.9 (222 ratings) — better |
| Positive reviews | 85.7% of reviews | 97.4% of reviews — better |
| Number of ratings | 6 | 222 — better |
| Update frequency | Monthly | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Best chart rank | — | #93 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 2 MB | 42 MB |
| Age rating | 4+ | 4+ |
| Developer | Thomas Barton | David Eubank |
Customer experience
FLICKERfree Calculator
pCAM Pro
Bugs and requests
FLICKERfree Calculator
Not enough reviews yet to summarise bugs or requests.
pCAM Pro
Reported bugs
1 issue- None explicitly mentioned, but feature requests imply areas for improvement.
Requested features
3 requests- Access iPhone camera for exact POV simulation
- Implement a night mode
- Relocate hyperfocal 'apply' button in Depth-of-Field calculator
In-app purchases
FLICKERfree Calculator
No in-app purchases
pCAM Pro
- Small Tip$1.99
- Medium Tip$4.99
- Large Tip$7.99







