# Adding Machine 10Key Univ Lite vs Rapid & Quick Calculator Pro

The clearest difference is price: Adding Machine 10Key Univ Lite at Free against Rapid & Quick Calculator Pro's $3.99. Adding Machine 10Key Univ Lite also leads on ads (none vs shown) and update cadence (every 6 weeks vs every 5 months). Rapid & Quick Calculator Pro's advantage is rating (4.9 vs 4.3) and review sentiment (90% vs 80%). On ratings volume, in-app purchases and device support there is nothing between them.

Adding Machine 10Key Univ Lite is free to download; Rapid & Quick Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rapid & Quick Calculator Pro holds the better App Store score, 4.9 against 4.3. Both are backed by a comparable volume of ratings — 192 and 206 respectively. Written reviews point the same way: 80% of Adding Machine 10Key Univ Lite's written reviews are positive against 90% of Rapid & Quick Calculator Pro's.

Adding Machine 10Key Univ Lite ships an update every 6 weeks, Rapid & Quick Calculator Pro every 5 months. The most recent releases landed on October 22, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Adding Machine 10Key Univ Lite | Rapid & Quick Calculator Pro |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | [4.3 (192 ratings)](https://appshunter.io/ios/app/adding-machine-10key-univ-lite/id579393645/reviews) | **[4.9 (206 ratings)](https://appshunter.io/ios/app/rapid-and-quick-calculator-pro/id1067631562/reviews)** |
| Number of ratings | 192 | **206** |
| Positive reviews | 79.6% of reviews | **90.1% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | **Free** | Paid |
| Size | 23 MB | 7 MB |
| Requires iOS | **12.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Richard Silverman](https://appshunter.io/developer/297096643) | [KinkumaDesign](https://appshunter.io/developer/385697725) |

## What reviewers say

### Adding Machine 10Key Univ Lite

[App page](https://appshunter.io/ios/app/adding-machine-10key-univ-lite/id579393645)

This app emulates a traditional 10-key adding machine for precise calculations. It offers features like reversed operator entry, percentage calculation, and the ability to edit and save paper tape files. The iPad version includes a full-size keypad with audio feedback for enhanced accuracy.

**Highlights:** 10-key adding machine emulation, Reversed operator entry, Percentage calculation, Paper tape editing and saving, Export paper tape files, TypeTone audio feedback (iPad)

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 👍 Works like a real adding machine
- 👍 Tape feature is useful
- 👍 Large, clear numbers
- 👍 Good for bookkeeping

**What reviewers complain about**

- 💸 Paid version is expensive
- 📉 Ads take up screen space on iPhone
- 🤏 Keys are too small on lite version
- 🗄️ Lite version has limited lines
- 💡 Trailing zeros not displayed

**Reported bugs**

- 3 digits get frozen during calculations
- Crashed and lost data
- The "don't ask again" button for reviews does nothing
- App freezes when switching apps

**Requested features**

- Ability to set automatic cents
- Two sales tax rates or ability to deselect items from tax
- More lines in the free version
- More screen space on iPhone
- Ability to add more before clearing


### Rapid & Quick Calculator Pro

[App page](https://appshunter.io/ios/app/rapid-and-quick-calculator-pro/id1067631562)

This calculator app offers essential functions plus advanced features like sales tax and discount calculations. Easily reuse past answers, edit expressions with cursor keys, and customize themes and fonts. Share your calculations with others.

**Highlights:** History tape for reusing answers, Sales tax and discount calculations, Precise rounding settings, Editable expressions with cursor keys, Multiple color themes and font options, Share expressions and answers

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 📜 History feature is helpful
- 📋 Copy and paste functionality
- ✨ Customizable appearance
- ✅ Clear display of calculations

**What reviewers complain about**

- 🐛 App crashes on paste
- 🐛 Random calculations appear
- 🐛 Laggy input on startup
- 🐛 iPad bug with screen switching
- 🐛 Swipe responsiveness issues

**Reported bugs**

- App crashes when pasting copied expression and pressing equals
- Random calculations appear in current box after clearing and reopening
- Laggy drawing of input on startup
- App becomes unusable on iPad after screen switching
- Swipe response is poor

**Requested features**

- Dark mode for icon
- Larger calculation display window
- Separate tax buttons (pre/post tax)
- Vibration option for input
- Add memo to history


## Frequently asked questions

### Is Adding Machine 10Key Univ Lite free?

Adding Machine 10Key Univ Lite is free to download, with no in-app purchases.

### Is Rapid & Quick Calculator Pro free?

Rapid & Quick Calculator Pro costs $3.99, with no in-app purchases.

### Which has better reviews, Adding Machine 10Key Univ Lite or Rapid & Quick Calculator Pro?

Rapid & Quick Calculator Pro is rated higher. Adding Machine 10Key Univ Lite averages 4.3 out of 5 from 192 ratings, while Rapid & Quick Calculator Pro averages 4.9 from 206 ratings.

### Do Adding Machine 10Key Univ Lite or Rapid & Quick Calculator Pro have ads?

Rapid & Quick Calculator Pro shows ads; Adding Machine 10Key Univ Lite does not.

### Which is updated more often, Adding Machine 10Key Univ Lite or Rapid & Quick Calculator Pro?

Adding Machine 10Key Univ Lite ships an update every 6 weeks, and Rapid & Quick Calculator Pro every 5 months. Most recently, Adding Machine 10Key Univ Lite was updated on October 22, 2026 and Rapid & Quick Calculator Pro on October 29, 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.*