# Uno Calculator vs Mettle Inspect

The clearest difference is update cadence: Mettle Inspect at weekly against Uno Calculator's every 5 months. Mettle Inspect also leads on rating (5.0 vs 4.6) and review sentiment (100% vs 73%). Uno Calculator's advantage is ratings volume (116 vs 2) and device support (4 vs 2). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Mettle Inspect holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Uno Calculator has 116 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Uno Calculator's written reviews are positive against 100% of Mettle Inspect's.

Uno Calculator ships an update every 5 months, Mettle Inspect weekly. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Uno Calculator | Mettle Inspect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (116 ratings)](https://appshunter.io/ios/app/uno-calculator/id1464736591/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/mettle-inspect/id6792928163/reviews)** |
| Number of ratings | **116** | 2 |
| Positive reviews | 73.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | Free | Free |
| Size | 96 MB | 57 MB |
| Requires iOS | **14.2** | 16.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Uno Platform Inc.](https://appshunter.io/developer/1617866832) | [KUVO LABS, LLC](https://appshunter.io/developer/6792928165) |

## What reviewers say

### Uno Calculator

[App page](https://appshunter.io/ios/app/uno-calculator/id1464736591)

This app offers a comprehensive suite of calculation tools, handling everything from basic arithmetic to complex unit conversions. It supports measurements for size, temperature, speed, energy, and currency, making it a versatile solution for diverse needs.

**Highlights:** Arithmetic calculations, Unit conversions, Size measurements, Temperature conversions, Speed calculations, Energy calculations, Currency exchange

**In-app purchases:** none

**What reviewers like**

- 💰 Completely free with no ads or in-app purchases
- 🎨 Clean, minimalist, and intuitive user interface
- 🔧 Multiple calculator modes (standard, scientific, programmer)
- 📊 Useful unit conversion features
- 📜 Helpful history and memory panes for tracking calculations

**What reviewers complain about**

- ⌨️ No keyboard input support on Mac or iPad (major recurring complaint)
- 📍 Calculator buttons positioned on left side (inconvenient for right-handed users)
- 📜 History pane cannot be hidden or minimized
- ⏱️ Slower app launch time compared to stock calculator
- 🐢 Laggy performance on macOS with slow button responsiveness

**Reported bugs**

- Standard calculator mode doesn't follow order of operations (1+2*3 = 9 instead of 7)
- Buttons disappear while using on iPad
- Apple Pencil input causes buttons to blend into background
- Slow key responsiveness on macOS
- Numeric keypad input not recognized from Apple keyboard

**Requested features**

- Keyboard input support for Mac and iPad (most requested)
- Copy and paste functionality for results and formulas
- Option to reposition calculator buttons to right side
- Ability to hide or collapse history pane
- Persistent history that saves after app closes


### Mettle Inspect

[App page](https://appshunter.io/ios/app/mettle-inspect/id6792928163)

This platform enables inspection organizations and their teams to manage and capture on-site inspection information. It allows for project management, detailed field inspections, and secure data synchronization with an organization's workspace. Capture visual evidence, record observations, and collaborate with team members, even with limited connectivity.

**Highlights:** Project management, Field inspections, Picture documentation with annotations, Offline workflows, Team collaboration, Secure data synchronization

**In-app purchases:** none


## Frequently asked questions

### Is Uno Calculator free?

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

### Is Mettle Inspect free?

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

### Which has better reviews, Uno Calculator or Mettle Inspect?

Mettle Inspect is rated higher. Uno Calculator averages 4.6 out of 5 from 116 ratings, while Mettle Inspect averages 5.0 from 2 ratings.

### Do Uno Calculator or Mettle Inspect have ads?

Neither Uno Calculator nor Mettle Inspect shows ads.

### Which is updated more often, Uno Calculator or Mettle Inspect?

Uno Calculator ships an update every 5 months, and Mettle Inspect weekly. Most recently, Uno Calculator was updated on October 24, 2026 and Mettle Inspect on October 10, 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.*