compounds vs Interest Meter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
compounds
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複利計算を簡単に行えるアプリです。 【主な機能】 • 初期投資額、年利率、運用期間を設定して複利計算 • 月間積立額の設定で積立投資の計算も可能 • 計算結果の保存・管理機能 • 直感的なUIで誰でも簡単に使用可能 • 計算履歴の確認・編集・削除 【こんな方におすすめ】 • 投資を始めたい方 • 老後資金の準備を考えている方 • 複利の効果を確認したい方 • 資産運用のシミュレーションをしたい方 • 積立投資の計画を立てたい方 【使用例】 • 老後資金の準備計画 • 教育資金の積立計画 • 投資信託の運用シミュレーション • 定期預金との比較検討 複利の力で資産を増やしましょう!
Interest Meter
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Do you know exactly how much interest your savings are earning? Interest Meter is a clean, precise calculator for bank deposit interest. It supports both simple and compound interest, and automatically deducts withholding tax (default: Japan's 20.315%) so you can see your real take-home earnings. --- Free Features --- - Simple and compound interest calculation - Compound frequency: yearly, semi-annual, monthly, or **custom** (specify any number of compounding events per year — e.g. 4 quarterly, 52 weekly, 365 daily) - Flexible deposit period (1 to 50 years) - See pre-tax and after-tax interest at a glance - Year-by-year breakdown chart - Customizable tax rate (default: 20.315%) - Clean, intuitive design --- Premium Features (one-time purchase) --- - Switch the calculator to any of 9 foreign currencies (USD, EUR, GBP, AUD, CNY, HKD, SGD, KRW, THB) - Live exchange rates with a JPY conversion section in the result view - Ad-free experience across the entire app --- Who Is This For? --- - Anyone checking returns on fixed deposits - People who want to see compound interest in action - Savers who want to know their real after-tax yield - Anyone taking the first step toward smarter money management - Foreign-currency depositors who need quick JPY conversions Simple by design. Check your deposit interest today.
Screenshots
Verdict
The clearest difference is ads: compounds at none against Interest Meter's shown. Interest Meter's advantage is iOS requirement (16.0 vs 18.4). On price, update cadence, 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. compounds sells 1 one-off in-app purchase and Interest Meter sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
compounds ships an update weekly, Interest Meter every 3 days. The most recent releases landed on September 10, 2026 and September 9, 2026 respectively.
| Parameter | compounds | Interest Meter |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.4 | 16.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Kenta Fujiwara | Fuji Bit Inc. |
In-app purchases
compounds
- プレミアムプラン$1.99
Interest Meter
- Premium$2.99









