Master It vs Mobile KD
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
Mobile KD
This utility app allows users to query remote data and manage accounts for KD200 and KD900 devices. Users can edit remote data, but it does not support generating new remotes. Users are responsible for adhering to laws when editing data.
- Query remote data
- Account management
- Edit remote data
- Device compatibility (KD200, KD900)
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Mobile KD is assistant software of KD200 and KD900, it's convenient for users to query remotes data. It also support account management, users can edit remotes data as they want. This software now do not support generating remotes. Please obey the law when edit the remotes data on the software, individual legal responsibility will be traced by users' log account or address.
Screenshots
Verdict
The clearest difference is price: Mobile KD at Free against Master It's $6.99. Mobile KD also leads on rating (4.6 vs 3.7) and update cadence (fortnightly vs every 2 months). Master It's advantage is review sentiment (76% vs 48%) and chart position (#198 vs unranked). On ads, in-app purchases 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
Mobile KD is free to download; Master It costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Mobile KD holds the better App Store score, 4.6 against 3.7. Both are backed by a comparable volume of ratings — 18 and 59 respectively. Written reviews complicate that: 76% of Master It's written reviews are positive against 48% of Mobile KD'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, Mobile KD fortnightly. The most recent releases landed on September 7, 2026 and September 21, 2026 respectively.
| Parameter | Master It | Mobile KD |
|---|---|---|
| Price | $6.99 | Free — better |
| Rating | 3.7 (18 ratings) | 4.6 (59 ratings) — better |
| Positive reviews | 76.2% of reviews — better | 47.5% of reviews |
| Number of ratings | 18 | 59 — better |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #198 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 6 MB | 114 MB |
| Age rating | 4+ | 4+ |
| Developer | Farren Domenici | Shenzhen Ecartek Technology, Ltd. |
Customer experience
Master It
Mobile KD
In-app purchases
Master It
No in-app purchases
Mobile KD
No in-app purchases








