Vernier Caliper Micrometer vs Kaliper
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vernier Caliper Micrometer
This utility app transforms your iPhone or iPad into a precise measuring tool for short lengths. It supports both inch and centimeter units, features calibration, and offers a user-friendly interface.
- Measures short lengths
- Supports inches and centimeters
- Unit switching
- Calibration feature
- Easy to use interface
- Attractive UI
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This app turns your iPhone into a vernier caliper. Features: + Designed for measuring short length + Support both inch and centimeter + Unit switch + Calibration + Easy to use + Good-looking UI
Kaliper
Measure key cuts accurately using your device's camera. This utility helps decode keys when a physical caliper is unavailable or difficult to read. Offers predefined systems and custom measurement options for various lock types.
- Measure key cuts with device camera
- Predefined lock systems
- Custom key measurement input
- Ad-free upgrade option
- Supports various lock brands
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Out-of-the-shop and out-of-the-van key gauge utility. Have a key you need to decode but no caliper or key gauge nearby? Not 100% confident on your eyesight to read the cuts? Then use your iDevice to measure the key with Kaliper. Kaliper is free to download with a purchase option for upgrading. It is recommended to get accustomed to the app prior to purchasing as with any tool, this app has a learning curve and with practice comes perfection. The free version comes with two predefined systems: Arrow .014" and Schlage .015" (5 pin only). The full version comes with eight predefined systems: Arrow .014" (5/6 pin), Best A2, A3, A4 (6/7 pin), Kwikset .023" (standard/titan), Sargent .020" (5/6 pin), Schlage .015" (5/6 pin), and Yale .019" (5/6 pin). In addition to custom key measurements and of course no ads. Instructions: On the main page begin by selecting your iDevice from the choices on the left, then select either a predefined system or custom. Do not use full screen on iPads. Predefined: Lay your device on a flat surface and place your key on top of the silhouette, using the top shoulder (or bottom tip for best systems) as the primary focus for alignment. If aligned properly each of the cut markers will sit directly above each corresponding cut. If necessary, use the zoom control at the bottom for a better fit. Once the key is aligned, tap on the first down arrow in the upper right hand corner to lower the cut marker. Each tap represents a deeper cut with the depth displayed directly above the arrow. Keep tapping until the marker outlines the cut. If the marker starts to disappear behind the key use the up arrow to raise the marker. Do this for the remaining cuts to finish measuring your key. Custom: The measuring process remains the same as the predefined systems, but as the markers are customizable some measurements need to be supplied before proceeding: Bow to First Cut: The distance from the center of the first cut to the top shoulder. Cut to Cut: The distance between the center of each cut. Shallowest Depth: The distance from the bottom of the blade to the center of the lowest cut in the system (i.e. Zero or One). Depth Increment: The distance between subsequent cuts. These measurements are typically found on pinning kits, however the system you are inputting may be found on the Charts page. From this chart simply tap on the system and all the measurements will be automatically applied. If inputting manually, type the measurements into the 4 boxes and tap Apply. The markers will adjust accordingly and you can begin measuring the key using the shoulder and blade for alignment. If the system uses a One as the shallowest cut, tap on 0 - 9 to reflect a 1 thru 10 cut system. Tap again to switch back. Compatibility (sorted by screen size): iPhone SE2, SE3, 12 mini, 13 mini, 11 Pro, 11, 12, 12 Pro, 13, 13 Pro, 14, 14 Pro, 15, 15 Pro, 16, 16e, 17e, 16 Pro, 17, 17 Pro, Air, 11 Pro Max, 12 Pro Max, 13 Pro Max, 14 Plus, 14 Pro Max, 15 Plus, 15 Pro Max, 16 Plus, 16 Pro Max, 17 Pro Max Found a bug? Something not working? Have a suggestion? Feel free to contact me via email: farren@phoxlocks.com
Screenshots
Verdict
The clearest difference is rating: Kaliper at 4.6 against Vernier Caliper Micrometer's 4.1. Kaliper also leads on update cadence (every 8 months vs every 20 months). Vernier Caliper Micrometer's advantage is ads (none vs shown) and iOS requirement (9.0 vs 14.0). On price, review sentiment, ratings volume and in-app purchases 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
Both are free to download. Vernier Caliper Micrometer sells 1 one-off in-app purchase and Kaliper sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Kaliper holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 22 and 8 respectively. Written reviews split almost evenly too, at 50% and 50% positive.
Vernier Caliper Micrometer ships an update every 20 months, Kaliper every 8 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | Vernier Caliper Micrometer | Kaliper |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (22 ratings) | 4.6 (8 ratings) — better |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| Number of ratings | 22 — better | 8 |
| Update frequency | Every 20 months | Every 8 months — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 24 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | 齐 陈 | Farren Domenici |
Customer experience
Vernier Caliper Micrometer
Kaliper
In-app purchases
Vernier Caliper Micrometer
- Remove Ads$0.99
Kaliper
- Kaliper Full Version$1.99
Questions
Is Vernier Caliper Micrometer free?
Is Kaliper free?
Which has better reviews, Vernier Caliper Micrometer or Kaliper?
Do Vernier Caliper Micrometer or Kaliper have ads?
Which is updated more often, Vernier Caliper Micrometer or Kaliper?
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