# Compounder vs Coast FIRE Calculator

The clearest difference is price: Compounder at Free against Coast FIRE Calculator's $4.99. Compounder also leads on rating (4.8 vs 1.0) and in-app purchases (none vs 1). Coast FIRE Calculator's advantage is update cadence (every 2 days vs every 3 weeks). On ads, device support and iOS requirement there is nothing between them.

Compounder is free to download; Coast FIRE Calculator costs $4.99 up front. Coast FIRE Calculator sells 1 one-off in-app purchase. Compounder asks for nothing beyond the download.

Compounder holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: Compounder has 4.3K ratings behind it against 1, so its average is the more settled of the two.

Compounder ships an update every 3 weeks, Coast FIRE Calculator every 2 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Compounder | Coast FIRE Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.8 (4.3K ratings)](https://appshunter.io/ios/app/compounder/id1412552240/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/coast-fire-calculator/id6754495451/reviews) |
| Number of ratings | **4.3K** | 1 |
| Positive reviews | 61.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | Free | — |
| Size | 3 MB | 30 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [James Bevins](https://appshunter.io/developer/1137750302) | [Ataraxia Labs](https://appshunter.io/developer/1823083991) |

## What reviewers say

### Compounder

[App page](https://appshunter.io/ios/app/compounder/id1412552240)

Calculate the growth of savings and investments using compound interest. Explore how regular contributions and withdrawals impact your financial goals over time. Designed for anyone to understand and utilize the power of compounding for wealth building.

**Highlights:** Calculate compound interest, Flexible settings, Factor in periodic withdrawals, Factor in additional contributions, Easy-to-use interface

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Instant results
- 💡 Helps explain investments
- 🚀 Simple and easy to use
- 👍 Best and easiest compound calculator

**What reviewers complain about**

- 🐛 Glitchy and not user-friendly after update
- 🐛 Can't use quarterly, monthly, or weekly buttons after update
- 🐛 New version not working well on iPhone
- 🐛 Can't click off of monthly to quarterly, yearly, or weekly
- 🐛 Compound frequency stuck on monthly after update

**Reported bugs**

- Calculation issues with initial investment
- Formatting issues on mobile devices
- Crashes after short usage

**Requested features**

- Add percentage option for withdrawal
- Allow adjusting periodic contributions (weekly, monthly, etc.)
- Include daily compounding option
- Add inflation adjustment to contributions and outputs
- Create a widget version


### Coast FIRE Calculator

[App page](https://appshunter.io/ios/app/coast-fire-calculator/id6754495451)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad-Free Usage | $8.99 | one-time |


## Frequently asked questions

### Is Compounder free?

Compounder is free to download, with no in-app purchases.

### Is Coast FIRE Calculator free?

Coast FIRE Calculator costs $4.99, and also offers in-app purchases.

### Which has better reviews, Compounder or Coast FIRE Calculator?

Compounder is rated higher. Compounder averages 4.8 out of 5 from 4.3K ratings, while Coast FIRE Calculator averages 1.0 from 1 ratings.

### Do Compounder or Coast FIRE Calculator have ads?

Neither Compounder nor Coast FIRE Calculator shows ads.

### Which is updated more often, Compounder or Coast FIRE Calculator?

Compounder ships an update every 3 weeks, and Coast FIRE Calculator every 2 days. Most recently, Compounder was updated on October 25, 2026 and Coast FIRE Calculator on October 24, 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.*