# FIRE / Side FIRE vs FIREシミュレーション

The clearest difference is update cadence: FIREシミュレーション at every 2 days against FIRE / Side FIRE's every 11 days. FIRE / Side FIRE's advantage is iOS requirement (9.0 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FIRE / Side FIRE ships an update every 11 days, FIREシミュレーション every 2 days. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | FIRE / Side FIRE | FIREシミュレーション |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 11 days | **Every 2 days** |
| Monetization | Ad-supported | — |
| Size | 66 MB | 13 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [shun furukawa](https://appshunter.io/developer/1497405093) | [Mario Tanaka](https://appshunter.io/developer/505921265) |

## What reviewers say

### FIRE / Side FIRE

[App page](https://appshunter.io/ios/app/fire-side-fire/id1547206776)

This app helps users plan and track their journey towards financial independence and early retirement (FIRE). It offers simulation tools to calculate asset growth and target dates, along with visual progress tracking to maintain motivation.

**Highlights:** FIRE simulation up to target date, Monthly target asset display, Countdown to FIRE date, Daily reserves and dividend graphs, Asset management support

**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 FIRE / Side FIRE free?

FIRE / Side FIRE is free to download, 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 FIRE / Side FIRE or FIREシミュレーション have ads?

Both FIRE / Side FIRE and FIREシミュレーション show ads.

### Which is updated more often, FIRE / Side FIRE or FIREシミュレーション?

FIRE / Side FIRE ships an update every 11 days, and FIREシミュレーション every 2 days. Most recently, FIRE / Side FIRE was updated on October 13, 2026 and FIREシミュレーション on October 5, 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.*