Master It vs Light Meter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Master It
Instantly create and print master key systems without complex calculations. Supports various keyways and pin systems, with options for randomization and secure saving. Ideal for on-the-fly key management.
- Instant master key system creation
- Zero math required
- Supports multiple keyways
- Randomize TMK generation
- Print, email, or save systems
- 5 or 6 pin system support
- Shake to lock/unlock functions
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***FEATURED IN KEYNOTES MAGAZINE*** Create and print master key systems in an instant with Master It. Master It is perfect for small or on-the-fly systems. Create a master key matrix immediately with zero math and zero worries of cross-keying. Either enter in your own TMK or tap Randomize to create a complete master key system containing a single TMK, a single sub master, and up to 64 change keys. Each output delivers a fixed sub master and set of change keys. Master It is built to create a system immediately to print and keep in your records at your shop. It is capable of saving and reloading one project at a time. The goal with Master It is to create and AirPrint a system in an instant. If on the road when printing isn't available, email and save features are secondary backups prior to printing. Email is also ideal when a printer is not AirPrint compatible. Currently supports: Kwikset .023" Corbin Russwin .028" Weiser / Falcon .018" Ilco-Unican .018" Schlage .015" Arrow .014" Sargent .0125" & .020" Corbin .014" Obeys MACS rules for each selected system. AirPrint, Email, or Save any system created. Create 5 or 6 pin systems. Randomize feature to always generate a completely random TMK every time. Use the two filters to restrict the TMK to only shallow depths, or to always include the shallowest and deepest cuts. Tap anywhere on the matrix to select or deselect a bitting for the key chart. Shake your iDevice to lock the primary functions on the main screen. This is to prevent unwanted changes (i.e. accidentally tapping Reset). To unlock, just shake again. All change keys can be individually identified. Use the Project Name / Keyway box for temporary saving information. The actual printout will allow you to write in the business name, personal name, address, keyway, and phone number conveniently. After printing, the system can be continued manually on paper. Additionally, you can tap on each change key to display the pinning. Compatibility: All iPhone, iPad, iPod Touch types and generations with a minimum iOS version of 12.0 Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com
Light Meter
This application acts as a portable light meter, allowing users to measure light intensity in lux and foot candles. It offers real-time readings, a log library for saving measurements, and the ability to calibrate with professional devices for enhanced accuracy. The app supports both front and rear cameras and saves scene images.
- Real-time light intensity measurement
- Lux and foot candle readings
- Saveable log library
- Calibration with professional illuminometer
- Front and rear camera support
- Scene image saving
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Light Meter - Lux and foot candle measurement tool in your pocket! Light Meter for Film Photography. Light meter in your pocket! The only app you really need to measure light intensity. You can calibrated with professional Illuminometer. Features: - Exclusive simplicity and convenience of use with unique and attractive design. - Real-time measurements. - Result are save-able into log library. - All result are comparable with Variable Lux, foot candle, ISO and Date in log library. - Scene Image are save-able into camera-roll - Front and rear camera supported. - Lux and foot candle measurement. - Option to Calibrated with light sensitivity. To ensure the accuracy of measurements. you can calibrated with professional high-precision illuminometer. Note : Light Meter app is not a replacement for a professional device and should be used for private purposes only. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is rating: Light Meter at 4.2 against Master It's 3.7. Light Meter also leads on price ($2.99 vs $6.99). Master It's advantage is update cadence (every 2 months vs every 48 months) and review sentiment (76% vs 50%). On ads, in-app purchases, monetization model 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
Master It costs $6.99 and Light Meter $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Light Meter holds the better App Store score, 4.2 against 3.7. Both are backed by a comparable volume of ratings — 18 and 5 respectively. Written reviews complicate that: 76% of Master It's written reviews are positive against 50% of Light Meter's, so the app with the better star average is not the one people write more warmly about.
Master It ships an update every 2 months, Light Meter every 48 months. The most recent releases landed on September 7, 2026 and September 23, 2026 respectively.
| Parameter | Master It | Light Meter |
|---|---|---|
| Price | $6.99 | $2.99 — better |
| Rating | 3.7 (18 ratings) | 4.2 (5 ratings) — better |
| Positive reviews | 76.2% of reviews — better | 50.0% of reviews |
| Number of ratings | 18 — better | 5 |
| Update frequency | Every 2 months — better | Every 48 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | #198 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Farren Domenici | Nitrio |
Customer experience
Master It
Light Meter
In-app purchases
Master It
No in-app purchases
Light Meter
No in-app purchases









