# Instant Compound Calc! vs FIREシミュレーション

The clearest difference is price: FIREシミュレーション at Free against Instant Compound Calc!'s $2.99. FIREシミュレーション also leads on update cadence (every 2 days vs every 2 months). Instant Compound Calc!'s advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

FIREシミュレーション is free to download; Instant Compound Calc! costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Instant Compound Calc! ships an update every 2 months, FIREシミュレーション every 2 days. Both last shipped on September 17, 2026.

## The numbers

| Metric | Instant Compound Calc! | FIREシミュレーション |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 2 days** |
| Size | 7 MB | 13 MB |
| Requires iOS | **17.6** | 18.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shun Isayama](https://appshunter.io/developer/1578976556) | [Mario Tanaka](https://appshunter.io/developer/505921265) |

## What reviewers say

### Instant Compound Calc!

[App page](https://appshunter.io/ios/app/instant-compound-calc/id6738637650)

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

**In-app purchases:** none


### FIREシミュレーション

[App page](https://appshunter.io/ios/app/fire/id6742209276)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Instant Compound Calc! free?

Instant Compound Calc! costs $2.99, with no in-app purchases.

### Is FIREシミュレーション free?

FIREシミュレーション is free to download, with no in-app purchases.

### Do Instant Compound Calc! or FIREシミュレーション have ads?

FIREシミュレーション shows ads; Instant Compound Calc! does not.

### Which is updated more often, Instant Compound Calc! or FIREシミュレーション?

Instant Compound Calc! ships an update every 2 months, and FIREシミュレーション every 2 days. Most recently, Instant Compound Calc! was updated on September 17, 2026 and FIREシミュレーション on September 17, 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.*