Pro Unit Converter vs UnitStack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pro Unit Converter
This free utility app offers a quick and convenient way to convert various units with a beautiful and intuitive interface. Save frequently used conversions for easy access and convert everything from area and length to temperature and data.
- Multiple conversion categories
- Save frequent conversions
- Intuitive user interface
- Quick input and results
- Beautiful design
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A great and free application, Pro Unit Converter provides users with many tools for converting units in a quick, convenient, and beautiful manner. You can save conversions you use often so that you can access them quickly next time. It has an intuitive user interface so that you can input and view the results in a matter of seconds. Let's start with these categories: - Area - Length - Pressure - Power - Fuel-Mileage - Volume - Temperature - Speed - Weight - Angle - Torque - Shoes Size - Data - Force - Energy Thank you for your using this app.
UnitStack
This utility app allows for simultaneous unit and currency conversions, saving your progress and custom units. Its minimalist design ensures a clear and efficient user experience for all your measurement needs.
- Stack multiple conversions
- Persistent values
- Custom units of measure
- Minimalist interface
- Custom color themes
- Currency conversion
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UnitStack lets you stack multiple unit conversions at once—so you never have to switch units or reselect conversions again. Your conversions are always saved. Open the app and start typing. Add custom units too—like that old reliable sauce spoon. Built for speed and clarity • Stack multiple conversions at once • Persistent values — pick up where you left off • Minimal, distraction-free interface • Custom color themes, including your own • Support for custom units of measure Whether you’re comparing measurements, converting currencies, or working across systems, UnitStack keeps everything visible and friction-free. Currency exchange rates are provided by Frankfurter (ECB reference rates).
Screenshots
Verdict
The clearest difference is in-app purchases: UnitStack at none against Pro Unit Converter's 1. Pro Unit Converter's advantage is update cadence (daily vs every 2 days) and iOS requirement (11.0 vs 18.6). On price, ads, monetization model 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
Both are free to download. Pro Unit Converter sells 1 one-off in-app purchase. UnitStack asks for nothing beyond the download.
Pro Unit Converter ships an update daily, UnitStack every 2 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.
| Parameter | Pro Unit Converter | UnitStack |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Daily — better | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 37 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Quang Tri Mai Nguyen | Michael Yang |
Customer experience
Pro Unit Converter
UnitStack
In-app purchases
Pro Unit Converter
- Remove all Ads in the app$0.99
UnitStack
No in-app purchases
Questions
Is Pro Unit Converter free?
Is UnitStack free?
Do Pro Unit Converter or UnitStack have ads?
Which is updated more often, Pro Unit Converter or UnitStack?
Other comparisons
