# Conversion Calculator Plus vs PROTO Smart Tools

The clearest difference is in-app purchases: PROTO Smart Tools at none against Conversion Calculator Plus's 1. PROTO Smart Tools also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). Conversion Calculator Plus's advantage is update cadence (weekly vs every 2 months) and ratings volume (15K vs 31). On price, rating and device support there is nothing between them.

Both are free to download. Conversion Calculator Plus sells 1 in-app purchase, starting at $9.99 per year. PROTO Smart Tools asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Conversion Calculator Plus against 4.7 for PROTO Smart Tools. That said, the two scores are not equally well evidenced: Conversion Calculator Plus has 15K ratings behind it against 31, so its average is the more settled of the two. Written reviews are what separate them: 69% of Conversion Calculator Plus's written reviews are positive against 50% of PROTO Smart Tools's.

Conversion Calculator Plus ships an update weekly, PROTO Smart Tools every 2 months. The most recent releases landed on September 25, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Plus | PROTO Smart Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (15K ratings)](https://appshunter.io/ios/app/conversion-calculator-plus/id1113920724/reviews) | [4.7 (31 ratings)](https://appshunter.io/ios/app/proto-smart-tools/id1438193743/reviews) |
| Number of ratings | **15K** | 31 |
| Positive reviews | **69.2% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 58 MB | 20 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [Stanley Black & Decker, Inc.](https://appshunter.io/developer/414050137) |

## What reviewers say

### Conversion Calculator Plus

[App page](https://appshunter.io/ios/app/conversion-calculator-plus/id1113920724)

This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.

**Highlights:** Unit and currency conversion, Supports 160+ currencies (real & crypto), Automatic currency exchange rate updates, Simple or carousel design options, Dark Mode support, Customizable home screen layout, Split screen mode on iPad

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads For One Year | $9.99 | per year |

**What reviewers like**

- 🚀 Great app
- 👍 Easy to use
- 🚀 Comprehensive conversions
- 👍 Intuitive interface
- 🚀 Useful tool

**What reviewers complain about**

- 🐛 Consent required for tracking
- 🐛 Update problems
- 🐛 Currency not updating
- 🔒 Forced to allow tracking
- 🔒 Forced to subscribe or view ads

**Reported bugs**

- Currency conversion not working
- App gets stuck on consent page
- Unable to get past ads/subscription page

**Requested features**

- Add running pace conversions
- Add shoe size converter
- Provide paid ad-free version


### PROTO Smart Tools

[App page](https://appshunter.io/ios/app/proto-smart-tools/id1438193743)

This app connects to a smart torque wrench to precisely set target torque and record measurements for audits. It supports multiple units and angle measurements, allowing for quick setup and error reduction. Users can create and save complex tightening sequences, track history, and generate reports.

**Highlights:** Set target torque values, Record torque and angle measurements, Create and save tightening sequences, Generate and export audit reports, Supports multiple torque and angle units, Wrench calibration tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Conversion Calculator Plus free?

Conversion Calculator Plus is free to download, with in-app purchases available.

### Is PROTO Smart Tools free?

PROTO Smart Tools is free to download, with no in-app purchases.

### Which has better reviews, Conversion Calculator Plus or PROTO Smart Tools?

Conversion Calculator Plus and PROTO Smart Tools are both rated 4.7 out of 5 on the App Store, from 15K and 31 ratings respectively.

### Do Conversion Calculator Plus or PROTO Smart Tools have ads?

Conversion Calculator Plus shows ads; PROTO Smart Tools does not.

### Which is updated more often, Conversion Calculator Plus or PROTO Smart Tools?

Conversion Calculator Plus ships an update weekly, and PROTO Smart Tools every 2 months. Most recently, Conversion Calculator Plus was updated on September 25, 2026 and PROTO Smart Tools on August 31, 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.*