Comparison

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

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Instant Compound Calc!

Features
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A simple yet powerful compound interest calculator that computes complex calculations instantly! With easy operation, it displays highly accurate results. <App Features> 1. Simple and intuitive UI: Just input principal, annual rate, and years elapsed for easy compound interest calculation. The visually clear design ensures even first-time users can use it confidently. 2. Lightning-fast calculation: Tap the "Calculate" button after input to instantly view results. See the power of compound interest right away. 3. Clear results display: Results appear in large, easy-to-read fonts. Check principal plus interest and interest amounts for each year in detail. 4. User-friendly input keyboard: Optimized numeric keyboard with easy close button for smooth input. 5. Error prevention: Detects invalid inputs and shows error messages. Ensures accurate calculations with peace of mind. <Recommended For> * Investors (beginner to advanced): Simulate investment growth for future planning * Household managers: Understand savings and investment effects concretely * Educators: Use as a financial education tool for students * Economics learners: Learn compound interest concepts hands-on <Compound Interest Formula> * Total Amount = Principal × (1 + Annual Rate/100) ^ Years Elapsed Simple operation for precise compound interest calculations, anytime anywhere. Your essential tool for asset building! Paid app with no ads whatsoever.

About

FIREシミュレーション

Features
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あなたのFIRE、本当に実現できる? 3分でわかる、人生とお金の未来シミュレーター 【FIREシミュレーションとは】 FIREシミュレーションは、「いつFIREできるのか?」「何歳まで働けばいいのか?」を資産・収入・支出の情報から可視化できるアプリです。 ・いつFIREしたい? ・貯金はいくらある? ・FIRE後の生活費や収入は? ・投資額、利回りはどのくらい? これらを入力するだけで、将来の資産推移をグラフで確認できます。結果は画像で保存・共有もOK! 【主な機能】 ● ライフプランに応じた収支を細かく設定 ・収入、支出を複数登録可能 ・それぞれに期間設定ができるから、人生の節目に合わせてシミュレーション可能 ● たとえばこんな使い方 ・子どもの教育費は高校〜大学の期間だけ多めに ・老後の食費や交通費は少なめに調整 ・「この年齢までは働く」など柔軟に入力 ・一時的な出費(車の購入・旅行など)も反映! ● シミュレーション結果は画像で保存・共有可能! ・可能かどうかの結果だけではなく、支出や収入を項目ごとに合計し見える化します 【こんな方におすすめ】 ・早期リタイア(FIRE)を目指している方 ・定年後の資産計画を立てたい方 ・家族のライフイベントを考慮した人生設計をしたい方 ・すでにFIRE中の方も、今後の生活の持続性をチェックできます 人生設計を“見える化”して、未来の安心を手に入れよう。 ※アプリによる結果はあくまでシミュレーションですので、実際にFIREが可能であることを保証するものではございません。FIREは慎重にご判断ください。

Screenshots

Instant Compound Calc!3 screens
FIREシミュレーション4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 3 level
Instant Compound Calc! versus FIREシミュレーション: the parameters behind the verdict, then further details
ParameterInstant Compound Calc!FIREシミュレーション
Price$2.99Free — better
Update frequencyEvery 2 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad — betteriPhone
Requires iOS17.6 — better18.2
Further details — not scored
Size7 MB13 MB
Age rating4+4+
DeveloperShun IsayamaMario Tanaka

In-app purchases

None

Instant Compound Calc!

No in-app purchases

None

FIREシミュレーション

No in-app purchases

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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