Opera vs All Unit Conversion
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Opera
This app provides convenient, app-based Bluetooth control for doors, eliminating the need for traditional PC-based access systems. It offers a user-friendly interface for straightforward user management and system configuration.
- App-based Bluetooth door control
- User-friendly interface
- Straightforward user management
- No computer software required
- Intuitive system configuration
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The Opera-57401 is a compact, app-based door controller that is managed via Bluetooth with the mobile devices via a dedicated APP. The App-based door controller is more convenient, user friendly than conventional PC-based access control systems. The Opera-57401 application does not require the use of computer software, or extensive user training, the system configurations is a straight forward user management built in the intuitive App.
All Unit Conversion
Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.
- Length conversion
- Area conversion
- Volume conversion
- Mass conversion
- Time conversion
- Currency conversion
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This is a simple and useful free unit converter - Length Converter - Area Converter - Volume Converter - Mass Converter - Time Converter - Digital Storage Converter - Energy Converter - Currency Converter
Screenshots
Verdict
The clearest difference is review sentiment: Opera at 100% against All Unit Conversion's 50%. Opera also leads on update cadence (every 9 days vs every 2 months) and device support (3 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Opera ships an update every 9 days, All Unit Conversion every 2 months. The most recent releases landed on October 1, 2026 and October 17, 2026 respectively.
| Parameter | Opera | All Unit Conversion |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (17 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 50.0% of reviews |
| Number of ratings | — | 17 — better |
| Update frequency | Every 9 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 21 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Opera Srl | Tiago Do Couto |
Customer experience
Opera
All Unit Conversion
In-app purchases
Opera
No in-app purchases
All Unit Conversion
No in-app purchases
Questions
Is Opera free?
Is All Unit Conversion free?
Do Opera or All Unit Conversion have ads?
Which is updated more often, Opera or All Unit Conversion?
Other comparisons
