FIRE資産計算 vs FIRE Countdown
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
FIRE資産計算
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積立・目標・FIRE（4%ルール）をサクッと試算。年利3/5/7%で比較して、将来資産のイメージを掴めます。
FIRE Countdown
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"When will I finally have the freedom to choose how I work?" FIRE Countdown is a simulation app designed to answer that question and maximize your motivation for wealth building. Simply input your current assets, monthly contributions, and expected rate of return. The app instantly calculates the "Destined Day" you reach your financial goal in real-time.
Screenshots
Verdict
The clearest difference is update cadence: FIRE資産計算 at every 5 days against FIRE Countdown's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
FIRE資産計算 ships an update every 5 days, FIRE Countdown every 2 weeks. The most recent releases landed on September 18, 2026 and September 29, 2026 respectively.
| Parameter | FIRE資産計算 | FIRE Countdown |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.0 — better |
| Further details — not scored | ||
| Size | 31 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Hiroto Ouchi | Naoyuki Maeda |
In-app purchases
FIRE資産計算
No in-app purchases
FIRE Countdown
No in-app purchases
