# Adding Machine 10Key Universal vs Compound Interest Calc

The clearest difference is price: Compound Interest Calc at Free against Adding Machine 10Key Universal's $3.99. Compound Interest Calc also leads on ratings volume (6.5K vs 134). Adding Machine 10Key Universal's advantage is in-app purchases (none vs 1) and ads (none vs shown). On rating, update cadence and device support there is nothing between them.

Compound Interest Calc is free to download; Adding Machine 10Key Universal costs $3.99 up front. Compound Interest Calc sells 1 one-off in-app purchase. Adding Machine 10Key Universal asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.7 for Adding Machine 10Key Universal against 4.8 for Compound Interest Calc. That said, the two scores are not equally well evidenced: Compound Interest Calc has 6.5K ratings behind it against 134, so its average is the more settled of the two. Written reviews are what separate them: 94% of Adding Machine 10Key Universal's written reviews are positive against 69% of Compound Interest Calc's.

Adding Machine 10Key Universal ships an update every 2 months, Compound Interest Calc every 3 months. The most recent releases landed on September 26, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Adding Machine 10Key Universal | Compound Interest Calc |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.7 (134 ratings)](https://appshunter.io/ios/app/adding-machine-10key-universal/id579385939/reviews) | **[4.8 (6.5K ratings)](https://appshunter.io/ios/app/compound-interest-calc/id1509212588/reviews)** |
| Number of ratings | 134 | **6.5K** |
| Positive reviews | **94.0% of reviews** | 68.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#188** | — |
| Size | 23 MB | 16 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Richard Silverman](https://appshunter.io/developer/297096643) | [Dane Hankamer](https://appshunter.io/developer/1509095396) |

## 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


### Compound Interest Calc

[App page](https://appshunter.io/ios/app/compound-interest-calc/id1509212588)

Plan your financial future with a powerful compound interest calculator. It helps you visualize investment growth with periodic contributions and plan retirement withdrawals with inflation adjustments. Offers detailed breakdowns and interactive charts for informed financial decisions.

**Highlights:** Calculate investment growth with contributions, Plan retirement withdrawals with inflation, Interactive growth and depletion charts, Year-by-year detailed breakdowns, Real-time calculations, Works offline

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🚀 Visually appealing
- 🚀 Helpful for financial planning
- 🚀 Powerful compound interest calculations
- 🚀 Intuitive interface

**What reviewers complain about**

- 🐛 Scaling issues on smaller devices
- 🐛 Inaccurate calculations in certain scenarios
- 🐛 Frequent ads disrupting user experience
- 🐛 Crashing and compatibility issues
- 🐛 Lack of customization options

**Reported bugs**

- Withdrawal calculations showing incorrect results
- App crashing on certain device models
- Scaling issues on iPad devices
- Compound interest calculations not accurate for weekly/monthly contributions

**Requested features**

- Add dividend calculation option
- Allow for daily compound interest calculations
- Implement a save/load feature to retain user inputs
- Add ability to input one-time lump sum contributions
- Provide inflation-adjusted withdrawal calculations


## Frequently asked questions

### Is Adding Machine 10Key Universal free?

Adding Machine 10Key Universal costs $3.99, with no in-app purchases.

### Is Compound Interest Calc free?

Compound Interest Calc is free to download, with in-app purchases available.

### Which has better reviews, Adding Machine 10Key Universal or Compound Interest Calc?

Compound Interest Calc is rated higher. Adding Machine 10Key Universal averages 4.7 out of 5 from 134 ratings, while Compound Interest Calc averages 4.8 from 6.5K ratings.

### Do Adding Machine 10Key Universal or Compound Interest Calc have ads?

Compound Interest Calc shows ads; Adding Machine 10Key Universal does not.

### Which is updated more often, Adding Machine 10Key Universal or Compound Interest Calc?

Adding Machine 10Key Universal ships an update every 2 months, and Compound Interest Calc every 3 months. Most recently, Adding Machine 10Key Universal was updated on September 26, 2026 and Compound Interest Calc on September 23, 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.*