# Rapid & Quick Calculator Pro vs Compound Interest

The clearest difference is ads: Compound Interest at none against Rapid & Quick Calculator Pro's shown. Compound Interest also leads on price ($1.99 vs $3.99) and iOS requirement (14.0 vs 17.6). Rapid & Quick Calculator Pro's advantage is review sentiment (90% vs 68%) and rating (4.9 vs 4.7). On ratings volume, update cadence, in-app purchases and chart position there is nothing between them.

Rapid & Quick Calculator Pro costs $3.99 and Compound Interest $1.99 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 — 206 and 239 respectively. Written reviews point the same way: 90% of Rapid & Quick Calculator Pro's written reviews are positive against 68% of Compound Interest's.

Rapid & Quick Calculator Pro ships an update every 5 months, Compound Interest every 4 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Rapid & Quick Calculator Pro | Compound Interest |
| --- | --- | --- |
| Price | $3.99 | **$1.99** |
| Rating | **[4.9 (206 ratings)](https://appshunter.io/ios/app/rapid-and-quick-calculator-pro/id1067631562/reviews)** | [4.7 (239 ratings)](https://appshunter.io/ios/app/compound-interest-compounder/id1457510419/reviews) |
| Number of ratings | 206 | **239** |
| Positive reviews | **90.1% of reviews** | 67.7% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Paid | **Free** |
| Best chart rank | #198 | **#174** |
| Size | 7 MB | 1 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KinkumaDesign](https://appshunter.io/developer/385697725) | [TernUp LLC](https://appshunter.io/developer/1457510418) |

## What reviewers say

### Rapid & Quick Calculator Pro

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

**Currently charting:** #198 Top Paid · Finance (US App Store)

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


### Compound Interest

[App page](https://appshunter.io/ios/app/compound-interest-compounder/id1457510419)

**Currently charting:** #174 Top Paid · Finance (US App Store)

Calculate and visualize the growth of your savings and investments over time. Explore different scenarios to understand the power of compound interest and plan for your financial goals, such as retirement.

**Highlights:** Visualize savings growth with interactive graphs, Calculate required contributions for financial goals, Experiment with different saving scenarios, Flexible calculations for balance, contribution, or time, Link tabs for complex strategy comparisons, Customizable light and dark themes

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

**In-app purchases:** none

**What reviewers like**

- 👍 Clean and simple design
- 🚀 Fast calculations
- 💡 Multiple tabs for different calculations
- ✨ Visually appealing interface
- 🚫 No obnoxious advertising

**What reviewers complain about**

- 🐛 App freezes frequently
- 🐛 App crashes on interaction
- 🐛 iPad version broken
- 🐛 Cannot input numbers
- 🐛 Calculations are wrong

**Reported bugs**

- App keeps freezing
- App freezes when changing initial amount
- App crashes when tapping screen
- iPad version doesn't register changes
- iPad version resets starting balance to zero

**Requested features**

- Add annual lump sums
- Solve for required opening balance
- Save financial models with names
- Ability to adjust for months instead of years
- Enter length in months


## Frequently asked questions

### Is Rapid & Quick Calculator Pro free?

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

### Is Compound Interest free?

Compound Interest costs $1.99, with no in-app purchases.

### Which has better reviews, Rapid & Quick Calculator Pro or Compound Interest?

Rapid & Quick Calculator Pro is rated higher. Rapid & Quick Calculator Pro averages 4.9 out of 5 from 206 ratings, while Compound Interest averages 4.7 from 239 ratings.

### Do Rapid & Quick Calculator Pro or Compound Interest have ads?

Rapid & Quick Calculator Pro shows ads; Compound Interest does not.

### Which is updated more often, Rapid & Quick Calculator Pro or Compound Interest?

Rapid & Quick Calculator Pro ships an update every 5 months, and Compound Interest every 4 months. Most recently, Rapid & Quick Calculator Pro was updated on November 6, 2026 and Compound Interest on November 2, 2026.

### Which is more popular, Rapid & Quick Calculator Pro or Compound Interest?

Rapid & Quick Calculator Pro currently peaks at #198 in the App Store charts, and Compound Interest at #174. Chart position reflects recent download velocity rather than total install base.

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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.*