# Conversion Calculator Plus vs Know My Water Pro

The clearest difference is in-app purchases: Know My Water Pro at none against Conversion Calculator Plus's 1. Know My Water Pro also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.0). Conversion Calculator Plus's advantage is update cadence (every 2 days vs every 2 months). On price 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. Know My Water Pro asks for nothing beyond the download.

Conversion Calculator Plus ships an update every 2 days, Know My Water Pro every 2 months. The most recent releases landed on October 28, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Conversion Calculator Plus | Know My Water Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (15K ratings)](https://appshunter.io/ios/app/conversion-calculator-plus/id1113920724/reviews)** | — |
| Number of ratings | **15K** | — |
| Positive reviews | 69.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 17 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Adysseus](https://appshunter.io/developer/447444997) | [Know My Well, LLC](https://appshunter.io/developer/1582657666) |

## 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, iPhone Duo 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


### Know My Water Pro

[App page](https://appshunter.io/ios/app/know-my-water-pro/id6451447960)

**Features:** macOS Compatibility

**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 Know My Water Pro free?

Know My Water Pro is free to download, with no in-app purchases.

### Do Conversion Calculator Plus or Know My Water Pro have ads?

Conversion Calculator Plus shows ads; Know My Water Pro does not.

### Which is updated more often, Conversion Calculator Plus or Know My Water Pro?

Conversion Calculator Plus ships an update every 2 days, and Know My Water Pro every 2 months. Most recently, Conversion Calculator Plus was updated on October 28, 2026 and Know My Water Pro on October 9, 2026.

---

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