# Calipers Tape Measure vs UnitPro

The clearest difference is price: UnitPro at Free against Calipers Tape Measure's $1.99. UnitPro also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.0 vs 17.0). Calipers Tape Measure's advantage is chart position (#187 vs unranked). On ads, in-app purchases and device support there is nothing between them.

UnitPro is free to download; Calipers Tape Measure costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calipers Tape Measure ships an update every 3 months, UnitPro every 3 weeks. The most recent releases landed on November 7, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Calipers Tape Measure | UnitPro |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.3 (26 ratings)](https://appshunter.io/ios/app/calipers-tape-measure/id6445826923/reviews)** | — |
| Number of ratings | **26** | — |
| Positive reviews | 77.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Best chart rank | **#187** | — |
| Size | 6 MB | 1 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jacob Parker](https://appshunter.io/developer/1153284524) | [晓 郭](https://appshunter.io/developer/1895645928) |

## What reviewers say

### Calipers Tape Measure

[App page](https://appshunter.io/ios/app/calipers-tape-measure/id6445826923)

**Currently charting:** #187 Top Paid · Utilities (US App Store)

Measure objects of any size with your phone. Features a 5-meter tape measure for larger items and a precision caliper mode for measuring small objects down to a tenth of a millimeter. Offers highly accurate readings tested across various devices and settings.

**Highlights:** 5-meter tape measure, Precision caliper mode, Measure to 0.1mm accuracy, Spirit level functionality, Accurate measurement testing

**In-app purchases:** none


### UnitPro

[App page](https://appshunter.io/ios/app/unitpro-all-converter/id6771362180)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Calipers Tape Measure free?

Calipers Tape Measure costs $1.99, with no in-app purchases.

### Is UnitPro free?

UnitPro is free to download, with no in-app purchases.

### Do Calipers Tape Measure or UnitPro have ads?

Neither Calipers Tape Measure nor UnitPro shows ads.

### Which is updated more often, Calipers Tape Measure or UnitPro?

Calipers Tape Measure ships an update every 3 months, and UnitPro every 3 weeks. Most recently, Calipers Tape Measure was updated on November 7, 2026 and UnitPro on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*