# Adding Machine 10Key Universal vs Rapid & Quick Calculator Pro

The clearest difference is ads: Adding Machine 10Key Universal at none against Rapid & Quick Calculator Pro's shown. Adding Machine 10Key Universal also leads on update cadence (every 2 months vs every 5 months) and chart position (#188 vs unranked). Rapid & Quick Calculator Pro's advantage is rating (4.9 vs 4.7). On price, review sentiment, ratings volume and in-app purchases there is nothing between them.

Adding Machine 10Key Universal costs $3.99 and Rapid & Quick Calculator Pro $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 4.7. Both are backed by a comparable volume of ratings — 134 and 205 respectively. Written reviews complicate that: 94% of Adding Machine 10Key Universal's written reviews are positive against 90% of Rapid & Quick Calculator Pro's, so the app with the better star average is not the one people write more warmly about.

Adding Machine 10Key Universal ships an update every 2 months, Rapid & Quick Calculator Pro every 5 months. Both last shipped on September 26, 2026.

## The numbers

| Metric | Adding Machine 10Key Universal | Rapid & Quick Calculator Pro |
| --- | --- | --- |
| Price | $3.99 | $3.99 |
| Rating | [4.7 (134 ratings)](https://appshunter.io/ios/app/adding-machine-10key-universal/id579385939/reviews) | **[4.9 (205 ratings)](https://appshunter.io/ios/app/rapid-and-quick-calculator-pro/id1067631562/reviews)** |
| Number of ratings | 134 | **205** |
| Positive reviews | **94.0% of reviews** | 90.1% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Paid | Paid |
| Best chart rank | **#188** | — |
| 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 Universal

[App page](https://appshunter.io/ios/app/adding-machine-10key-universal/id579385939)

**Currently charting:** #188 Top Paid · Finance (US App Store)

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 review and edit entries on a digital paper tape. Users can save, export, and print their calculation tapes.

**Highlights:** 10-key adding machine emulation, Reversed operator entry, Percentage calculation, Digital paper tape with editing, Save and export tapes (PDF), TypeTone audio feedback (iPad)

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🧮 Acts like an adding machine
- 🧾 Digital tape for review
- 🖨️ Can print tape
- 💾 Can save/export results

**What reviewers complain about**

- 🐛 Outdated and no support
- 🐛 Doesn't work for new iPad
- 🐛 Total only shows non-zero decimals
- 🐛 Ridiculous method to clear tape
- 🐛 % key not functional

**Reported bugs**

- Cannot save taped
- Cannot export results
- Does not work for new iPad
- Total only shows digits after the decimal that aren't zero
- Method to clear the tape is ridiculous

**Requested features**

- Add widget
- Add realistic sounds
- Add iCloud sync
- Improve tape clearing method
- Clarify functionality of % and +/- keys


### 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 Universal free?

Adding Machine 10Key Universal costs $3.99, 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 Universal or Rapid & Quick Calculator Pro?

Rapid & Quick Calculator Pro is rated higher. Adding Machine 10Key Universal averages 4.7 out of 5 from 134 ratings, while Rapid & Quick Calculator Pro averages 4.9 from 205 ratings.

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

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

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

Adding Machine 10Key Universal ships an update every 2 months, and Rapid & Quick Calculator Pro every 5 months. Most recently, Adding Machine 10Key Universal was updated on September 26, 2026 and Rapid & Quick Calculator Pro on September 26, 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.*