LensKit vs False Checker
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LensKit
This app provides professional tools for filmmakers and cinematographers, offering extensive lens specifications, camera coverage simulations, and advanced depth of field calculations. It helps plan shoots, make on-set decisions, and ensure compatibility with various cameras and lenses, including Netflix-approved formats.
- Extensive lens database (2000+ lenses)
- Camera sensor coverage simulation
- Lens matching for various configurations
- Depth of field calculator
- Shot preview and framing simulation
- Netflix 4K mandate compliance tool
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Whether you’re planning a shoot or making decisions on set, LensKit has you covered. Search over 2000 lenses from Angenieux, Arri, Cooke, Hawk, Leica, Zeiss and more. All specs and data sourced by hand: no AI means no hallucinations. SPECS Includes max aperture, lens mounts, weight, length, close focus, front diameter and more* COVERAGE Overlay a lens’ image circle on your camera sensor to make sure it’s covered. Includes over 200 cameras from Arri, Canon, Red, Sony, Blackmagic, Panasonic and more* LENS MATCH Mix and match spherical, anamorphic, speed boosters and extenders, and even factor in post-production extractions— the lens match tool can handle it all. EQUIVALENT No need to worry about crop factors or sensor sizes, just choose a focal length and a camera and get the Super35 equivalent. Or pick the S35 equivalent length you want and see the lens you’ll need. NETFLIX APPROVAL A game changer for anyone who’s struggled with the complexity of which formats and resolutions meet the Netflix "4K mandate"— especially when shooting in anamorphic. Designed in collaboration with Netflix. DEPTH OF FIELD An easy to use yet comprehensive DOF tool that allows for customizing circle of confusion with presets and manual input. PREVIEW See a simulation of your shot based on lens, camera and distance. Or pinch, zoom and reposition to get the exact frame you want, and see what lens or distance you’ll need for it. AND MORE Filter lenses to see only what fits your specific camera and needs. Save your calculations and return to them later. Group together lenses you rent or own for quick access. • Support • For support, send me an email at zak@grayhourmedia.com or message me on Instagram @_zakray. To see all supported cameras and lenses, just install the app (it's free to download!) and open the main dropdown menu. No internet connection required: all data is hard-coded into the app, so there’s no syncing process, and you’ll be able to access it even without a cell signal. • Disclaimer • The "price" feature uses affiliate links from B&H Photo Video. I receive a commission if you make a purchase from one of these links. • About • LensKit is developed by Zak Ray and the team at Gray Hour Media in NYC & LA. Gray Hour produces fresh and original content for film, episodic and the web. Head to www.grayhourmedia.com to check out our work! *Every lens in this app has complete specs, with the exception of some Panavision lenses. We’ve chosen to include these incomplete lenses in the app because of Panavision's importance in the industry. Additionally, while the large majority of lenses have exact image circle data, some—especially some vintage lenses—list only generic format coverage (e.g. Super35, Full Frame, etc) EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
False Checker
This tool helps filmmakers analyze exposure and lighting using false color visualization. It provides instant insights into lighting ratios and stop differences, aiding in on-set decisions and pre-production planning.
- False color visualization
- Lighting ratio calculator
- Quick reference tool
- Easy-to-use interface
- Exposure analysis
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False Checker was designed for filmmakers who need a quick and accurate way to analyze exposure on set or during pre-production. Whether you're referencing images on set or researching for upcoming projects, this tool gives you precise insights into lighting and exposure using false color. Features: False Color Visualization: Instantly convert images into false color to see exposure levels at a glance. Lighting Ratio Calculator: Tap two IRE swatches to get the lighting ratio and stop difference between highlights and shadows. Quick Reference Tool: Perfect for on-set use or pre-shoot planning, ensuring your lighting is spot on. Easy-to-Use Interface: Simple, intuitive design for fast analysis. Created to give filmmakers a quick and easy way to check exposure and lighting on the go. Whether you're on set or prepping for your next job, False Checker helps you nail the perfect shot.
Screenshots
Verdict
The clearest difference is review sentiment: LensKit at 70% against False Checker's 0%. LensKit also leads on price (Free vs $5.99) and rating (4.9 vs 4.0). False Checker's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement 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
LensKit is free to download; False Checker costs $5.99 up front. LensKit sells 3 in-app purchases, starting at $4.99 per month. False Checker asks for nothing beyond the download.
LensKit holds the better App Store score, 4.9 against 4.0. That said, the two scores are not equally well evidenced: LensKit has 56 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 70% of LensKit's written reviews are positive against 0% of False Checker's.
LensKit ships an update every 2 months, False Checker every 9 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.
| Parameter | LensKit | False Checker |
|---|---|---|
| Price | Free — better | $5.99 |
| Rating | 4.9 (56 ratings) — better | 4.0 (2 ratings) |
| Positive reviews | 70.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 56 — better | 2 |
| Update frequency | Every 2 months — better | Every 9 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 165 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Zak Ray | eric Hernandez |
Customer experience
LensKit
False Checker
In-app purchases
LensKit
- Monthly Subscription$4.991 Month
- Annual Subscription$49.991 Year
- Lifetime Access$99.99
False Checker
No in-app purchases









