# Unit Converter Calculator Pro vs Phage Study

The clearest difference is in-app purchases: Phage Study at none against Unit Converter Calculator Pro's 4. Phage Study also leads on ads (none vs shown). Unit Converter Calculator Pro's advantage is update cadence (monthly vs every 5 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Unit Converter Calculator Pro sells 4 one-off in-app purchases. Phage Study asks for nothing beyond the download.

Unit Converter Calculator Pro ships an update monthly, Phage Study every 5 months. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Unit Converter Calculator Pro | Phage Study |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (992 ratings)](https://appshunter.io/ios/app/unit-converter-calculator-pro/id1343845631/reviews)** | — |
| Number of ratings | **992** | — |
| Positive reviews | 76.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 37 MB | 59 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rome Rock LLC](https://appshunter.io/developer/1190244007) | [Adaptive Phage Therapeutics, Inc](https://appshunter.io/developer/1575574864) |

## What reviewers say

### Unit Converter Calculator Pro

[App page](https://appshunter.io/ios/app/unit-converter-calculator-pro/id1343845631)

Easily convert between metric and imperial units for a wide range of measurements including area, speed, temperature, and weight. Supports scientific prefixes and offers a history of your conversions. No internet connection required.

**Highlights:** Metric to Imperial unit conversion, Imperial to Metric unit conversion, Area, speed, temperature, volume, weight conversions, Scientific prefixes support, Conversion history, Offline functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Unlock Themes | $2.99 | one-time |
| Remove Ads & Unlock Themes 1 | $4.99 | one-time |
| Remove Ads & Unlock Themes 2 | $6.99 | one-time |
| Remove Ads & Unlock Themes 3 | $9.99 | one-time |

**What reviewers like**

- 🚀 Easy & accurate
- 🚀 Excellent Tool
- 👍 Goog for social
- 👍 Excelente para mi trabajo
- 👍 Sencillez

**What reviewers complain about**

- 👎 Hard to use interface
- 👎 Lacks pressure units
- 👎 No reverse button
- 👎 Metric to imperial format not user-friendly

**Reported bugs**

- 🐛 Changing to something else

**Requested features**

- 💡 Favorite conversations
- 💡 Color-coded sections
- 💡 Money conversion


### Phage Study

[App page](https://appshunter.io/ios/app/phage-study/id1658579818)

Access information about clinical studies focused on using bacteriophages to combat multi-drug resistant infections. This utility provides details on ongoing research and treatment approaches.

**Highlights:** Clinical study information, Phage therapy details, Multi-drug resistant infections, Research updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Calculator Pro free?

Unit Converter Calculator Pro is free to download, with in-app purchases available.

### Is Phage Study free?

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

### Do Unit Converter Calculator Pro or Phage Study have ads?

Unit Converter Calculator Pro shows ads; Phage Study does not.

### Which is updated more often, Unit Converter Calculator Pro or Phage Study?

Unit Converter Calculator Pro ships an update monthly, and Phage Study every 5 months. Most recently, Unit Converter Calculator Pro was updated on October 22, 2026 and Phage Study on October 24, 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.*