# Safety Note+ Pro vs Unit Converter | Converter4U

The clearest difference is in-app purchases: Unit Converter | Converter4U at none against Safety Note+ Pro's 6. Unit Converter | Converter4U also leads on iOS requirement (9.0 vs 15.0). Safety Note+ Pro's advantage is update cadence (fortnightly vs every 4 months) and review sentiment (77% vs 57%). On price, rating, ads and device support there is nothing between them.

Both are free to download. Safety Note+ Pro sells 6 in-app purchases, starting at $0.99 per month. Unit Converter | Converter4U asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.8 for Safety Note+ Pro against 4.6 for Unit Converter | Converter4U. Both are backed by a comparable volume of ratings — 744 and 194 respectively. Written reviews are what separate them: 77% of Safety Note+ Pro's written reviews are positive against 57% of Unit Converter | Converter4U's.

Safety Note+ Pro ships an update fortnightly, Unit Converter | Converter4U every 4 months. The most recent releases landed on October 22, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Safety Note+ Pro | Unit Converter | Converter4U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (744 ratings)](https://appshunter.io/ios/app/safety-note-plus-pro-locked-notes/id460661291/reviews)** | [4.6 (194 ratings)](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788/reviews) |
| Number of ratings | **744** | 194 |
| Positive reviews | **77.1% of reviews** | 57.1% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Paid | **Free** |
| Size | 79 MB | 51 MB |
| Requires iOS | 15.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Eightythree Technology](https://appshunter.io/developer/431033047) | [VisTech.Projects LLC](https://appshunter.io/developer/620969851) |

## What reviewers say

### Safety Note+ Pro

[App page](https://appshunter.io/ios/app/safety-note-plus-pro-locked-notes/id460661291)

Secure your private notes with advanced protection. This app offers passcode and biometric locks, intruder reports, and folder-specific security. Organize, back up, and share your sensitive information with peace of mind.

**Highlights:** Advanced security system, Passcode and biometric protection, Intruder report, Decoy password, Folder-specific locking, Note organization and backup

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iCloud Sync Monthly | $0.99 | per month |
| Cloud Backup Monthly | $1.49 | per month |
| iCloud Sync Yearly | $6.99 | per year |
| Cloud Backup Yearly | $8.99 | per year |
| Reset Password | $1.99 | one-time |
| iCloud Sync Lifetime | $49.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🔒 Secure password storage
- 🚀 Convenient organization
- 💡 Useful for storing sensitive information

**What reviewers complain about**

- 🐛 Bugs and crashes
- 🔒 Password reset issues
- 💰 Subscription model concerns
- 🔍 Lack of search functionality
- 📝 Limited formatting options

**Reported bugs**

- Notes not saving properly
- Password not recognized after updates
- App freezing or crashing on startup
- Incompatibility with newer iOS versions

**Requested features**

- Cloud sync and backup options
- Customizable themes and layouts
- Improved cursor and text selection controls
- Folder-level password protection
- Keyword search


### Unit Converter | Converter4U

[App page](https://appshunter.io/ios/app/unit-converter-converter4u/id620969788)

This app provides a powerful and intuitive way to convert between a wide range of units, including length, weight, temperature, and more. It offers simultaneous conversion of multiple units and customizable options for a personalized experience. Get instant, accurate results for all your conversion needs.

**Highlights:** Simultaneous multi-unit conversion, Customizable unit options, Copy converted values to clipboard, Supports numerous measurement categories, Intuitive and user-friendly interface

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

**In-app purchases:** none


## Frequently asked questions

### Is Safety Note+ Pro free?

Safety Note+ Pro is free to download, with in-app purchases available.

### Is Unit Converter | Converter4U free?

Unit Converter | Converter4U is free to download, with no in-app purchases.

### Which has better reviews, Safety Note+ Pro or Unit Converter | Converter4U?

Safety Note+ Pro is rated higher. Safety Note+ Pro averages 4.8 out of 5 from 744 ratings, while Unit Converter | Converter4U averages 4.6 from 194 ratings.

### Do Safety Note+ Pro or Unit Converter | Converter4U have ads?

Neither Safety Note+ Pro nor Unit Converter | Converter4U shows ads.

### Which is updated more often, Safety Note+ Pro or Unit Converter | Converter4U?

Safety Note+ Pro ships an update fortnightly, and Unit Converter | Converter4U every 4 months. Most recently, Safety Note+ Pro was updated on October 22, 2026 and Unit Converter | Converter4U on October 23, 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.*