# Safe Notes vs Ultimate Unit Converter Pro

The clearest difference is rating: Ultimate Unit Converter Pro at 5.0 against Safe Notes's 4.3. Ultimate Unit Converter Pro also leads on in-app purchases (none vs 3) and ads (none vs shown). Safe Notes's advantage is ratings volume (19 vs 3) and iOS requirement (15.6 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Safe Notes sells 3 in-app purchases, starting at $2.99 per month. Ultimate Unit Converter Pro asks for nothing beyond the download.

Ultimate Unit Converter Pro holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Safe Notes has 19 ratings behind it against 3, so its average is the more settled of the two.

Safe Notes ships an update every 10 days, Ultimate Unit Converter Pro every 3 days. The most recent releases landed on August 27, 2026 and June 10, 2026 respectively.

## The numbers

| Metric | Safe Notes | Ultimate Unit Converter Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (19 ratings)](https://appshunter.io/ios/app/safe-notes-notebook-notepad/id1644297724/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ultimate-unit-converter-pro/id6463096286/reviews)** |
| Number of ratings | **19** | 3 |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | **Every 3 days** |
| Monetization | Ad-supported | **Free** |
| Size | 79 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [QUYEN NGUYEN](https://appshunter.io/developer/988288907) | [Talal El Zeini](https://appshunter.io/developer/1521747288) |

## What reviewers say

### Safe Notes

[App page](https://appshunter.io/ios/app/safe-notes-notebook-notepad/id1644297724)

This app provides a secure and customizable way to take notes and manage to-do lists. It offers features like password protection, colorful themes, and data recovery, allowing users to organize and protect their thoughts and tasks.

**Highlights:** Secure note-taking with password and PIN lock, Create notes with text, checkboxes, and pictures, Customizable colorful themes and backgrounds, Data recovery for deleted notes up to 30 days, Dark and light mode options, Organize notes by color, category, and time, List/Grid view for notes

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium Access | $2.99 | per month |
| Yearly Premium Access | $12.99 | per year |
| Lifetime Premium Access | $19.99 | one-time |


### Ultimate Unit Converter Pro

[App page](https://appshunter.io/ios/app/ultimate-unit-converter-pro/id6463096286)

This utility app provides a streamlined way to perform unit conversions quickly and efficiently. It's designed to be an essential tool for users who need to make calculations on the go. Elevate your conversion experience with this powerful application.

**Highlights:** Seamless unit conversion, Quick calculations, Efficient workflow, Essential utility tool, Pro-grade experience

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Safe Notes free?

Safe Notes is free to download, with in-app purchases available.

### Is Ultimate Unit Converter Pro free?

Ultimate Unit Converter Pro is free to download, with no in-app purchases.

### Which has better reviews, Safe Notes or Ultimate Unit Converter Pro?

Ultimate Unit Converter Pro is rated higher. Safe Notes averages 4.3 out of 5 from 19 ratings, while Ultimate Unit Converter Pro averages 5.0 from 3 ratings.

### Do Safe Notes or Ultimate Unit Converter Pro have ads?

Safe Notes shows ads; Ultimate Unit Converter Pro does not.

### Which is updated more often, Safe Notes or Ultimate Unit Converter Pro?

Safe Notes ships an update every 10 days, and Ultimate Unit Converter Pro every 3 days. Most recently, Safe Notes was updated on August 27, 2026 and Ultimate Unit Converter Pro on June 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.*