Unit Converter | Converter4U vs Lock Notes Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Unit Converter | Converter4U
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.
- Simultaneous multi-unit conversion
- Customizable unit options
- Copy converted values to clipboard
- Supports numerous measurement categories
- Intuitive and user-friendly interface
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Convert units effortlessly with our powerful and intuitive unit conversion app. Seamlessly convert between length, area, volume, angle, weight, temperature, pressure, speed, energy, power, time, fuel usage, ring size and more, all in one place. Our app allows you to convert units on the fly, providing instant and accurate results. Key Features: - Simultaneously convert multiple units from various categories - Customizable unit options to suit your preferences - Copy converted values to the clipboard for easy sharing - No intrusive ads for a smooth user experience Whether you're a student, professional, traveler, or simply need quick unit conversions, our app has got you covered. Easily switch between different unit systems (metric, imperial, etc.) and make complex calculations a breeze. Download our unit conversion app now and experience the convenience and efficiency of having a comprehensive conversion tool right at your fingertips that saves you time.
Lock Notes Pro
Securely store and protect your private notes with password or Touch ID access. This app allows you to keep sensitive information like passwords, secrets, and diaries safe from unauthorized viewing. It offers features like iCloud backup and syncing, image insertion, and printing.
- Password and Touch ID protection
- iCloud backup and sync
- Insert images and photos
- Print notes
- Sort and customize notes
- Security question recovery
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A SINGLE PURCHASE COVERS ALL YOUR IPHONE AND IPAD DEVICES. FINALLY AN APP FOR ALL YOUR PRIVATE NOTES! Keep your most valuable, private, and secret notes away from prying eyes. Keep them all totally secret and safe. Store passwords, secrets, contacts or just keep your diary private. KEY FEATURES: • Use Touch ID or passcode to safely lock access to your private notes. • Set a security question and answer in case you forget your passcode. • Safely Backup your valuable notes to iCloud. • Quickly Sync notes between iPhone & iPad with iCloud. • Sort notes list by name, date or manual. • Select notes font style and size. • Insert images & photos into notes. • Print your notes. • Send notes via text message or email. • Save notes to Camera Roll. • Support for Emoji Emoticons. Terms of use: http://www.katans.com/terms-of-use Privacy policy: http://www.katans.com/privacy-policy
Screenshots
Verdict
The clearest difference is price: Unit Converter | Converter4U at Free against Lock Notes Pro's $9.99. Unit Converter | Converter4U also leads on in-app purchases (none vs 1) and iOS requirement (9.0 vs 13.0). Lock Notes Pro's advantage is update cadence (every 2 weeks vs every 4 months) and review sentiment (82% vs 57%). On rating, ratings volume, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Unit Converter | Converter4U is free to download; Lock Notes Pro costs $9.99 up front. Lock Notes Pro sells 1 in-app purchase, starting at $14.99 per year. Unit Converter | Converter4U asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for Unit Converter | Converter4U against 4.6 for Lock Notes Pro. Both are backed by a comparable volume of ratings — 194 and 270 respectively. Written reviews are what separate them: 57% of Unit Converter | Converter4U's written reviews are positive against 82% of Lock Notes Pro's.
Unit Converter | Converter4U ships an update every 4 months, Lock Notes Pro every 2 weeks. Both last shipped on October 14, 2026.
| Parameter | Unit Converter | Converter4U | Lock Notes Pro |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 4.6 (194 ratings) | 4.6 (270 ratings) |
| Positive reviews | 57.1% of reviews | 82.3% of reviews — better |
| Number of ratings | 194 | 270 — better |
| Update frequency | Every 4 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 51 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | VisTech.Projects LLC | JulyApps Ltd |
Customer experience
Unit Converter | Converter4U
Lock Notes Pro
Bugs and requests
Unit Converter | Converter4U
Not enough reviews yet to summarise bugs or requests.
Lock Notes Pro
Reported bugs
3 issues- Crashes after iOS updates
- Unable to edit or update notes without losing data
- Syncing issues between devices
Requested features
4 requests- Add checklist functionality
- Implement a recycle bin for deleted notes
- Improve syncing and backup options
- Add more customization options for font, layout, etc.
In-app purchases
Unit Converter | Converter4U
No in-app purchases
Lock Notes Pro
- Auto Backup$14.991 Year
Questions
Is Unit Converter | Converter4U free?
Is Lock Notes Pro free?
Which has better reviews, Unit Converter | Converter4U or Lock Notes Pro?
Do Unit Converter | Converter4U or Lock Notes Pro have ads?
Which is updated more often, Unit Converter | Converter4U or Lock Notes Pro?
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