日常物理 vs RYURAKU
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
日常物理
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身のまわりのあらゆる現象を、物理で測り直そう。 「日常物理」は、教科書の数式を生活の物差しに変える、シンプルで美しい計算アプリです。 新幹線の速さ、雷までの距離、お湯を沸かすカロリー、月の重力—— 27の計算で、世界の見え方が少しだけ変わります。 ■ 6つのカテゴリ × 27の計算 ◇ 毎日の"動き" 速度・加速度・力・運動エネルギー・停止距離・向心加速度 歩き、自転車、ドライブ。日常の動きを数字で実感できます。 ◇ 落ちるとどうなる? 自由落下の距離・時間・速度、位置エネルギー、バネの伸び、振り子の周期 スマホを胸の高さから落としたら何秒?直感では掴みにくい現象がクリアになります。 ◇ ものを投げる 放物運動の軌道と初速度 ボール・矢・水やりまで、投げる角度と距離の関係を体感。 ◇ 音と光 雷までの距離・エコー・音速・ドップラー効果 ピカッと光ってからゴロゴロまで何秒?雷雲との距離が一瞬でわかります。 ◇ 生活のエネルギー お湯を沸かすカロリー・階段で消費するエネルギー・電気代・LED節約 家計と健康、両方に効く物理。 ◇ 宇宙スケール 惑星の重力・地球の自転速度・光年距離 月で体重は何kg?太陽までの光の旅は何分? ■ プリセットで「数字を知らなくても」遊べる 「歩き 1.4 m/s」「自転車 20 km/h」「新幹線 320 km/h」「音速 1225 km/h」—— ふだん意識しない速さや距離が、ワンタップで入力欄に入ります。 数字に詳しくなくても、すぐに物理の世界に飛び込めます。 ■ あなたの"物理ノート"が育つ ・計算履歴を自動で記録 ・お気に入り機能で、よく使う計算をすぐ呼び出し ・公式と単位の解説つきで、なぜその答えになるのかが必ずわかる ■ 美しいデザイン、心地よい操作感 カテゴリごとに異なるグラデーションカラー。 ライト/ダークモード両対応。iPhoneとiPadの両方に最適化。 広告なし。完全日本語。オフラインで動きます。 ■ こんな人におすすめ ・通学・通勤中に雑学を貯めたい大人 ・理科の宿題と日常の直感を結びつけたい中高生 ・子どもの「なんで?」に一緒に答えたい親 ・物理が好き、または「ちょっと苦手だった」すべての人へ 教科書を開かなくても、物理は今日から始められる。 日常を、物理で読み解こう。
RYURAKU
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RYURAKU is an interactive educational simulation app for experiencing fluid dynamics phenomena firsthand. The 6th installment in the SUUGAKU / BUTURAKU / DENRAKU / HARAKU / NETURAKU series. The theme is "flow." Discover the wonders of fluid physics and the depth of physical laws through 10 hands-on simulations. [10 Simulations] 1. Streamline Visualization Visualize potential flow around a cylindrical obstacle in a uniform stream using particles. Drag the obstacle to move it and observe how the flow field changes in real time. 2. Bernoulli's Principle Visualize flow inside a Venturi tube. Watch how flow speed increases and pressure drops as the pipe narrows, with real-time pressure gauges. Intuitively understand the continuity equation A1v1 = A2v2. 3. Vortex Simulate point vortex creation and mutual induction. Tap to add a counterclockwise vortex, long press for clockwise. Observe complex vortex motion patterns. 4. Reynolds Number Visualize laminar-turbulent transition in pipe flow. Adjust flow speed, viscosity, and pipe diameter to manipulate the Reynolds number and experience the dramatic change at Re ≈ 2300. 5. Lift Force Visualize flow around an airfoil and the mechanisms behind lift and drag generation. Change the angle of attack or camber to see how the lift coefficient varies, with force vectors displayed in real time. 6. Kármán Vortex Street Visualize alternating vortex shedding behind a cylinder. Strouhal and Reynolds numbers are displayed in real time, helping you understand the relationship between shedding frequency, flow speed, and cylinder diameter. 7. Boundary Layer Visualize boundary layer development over a flat plate. Observe how viscous effects slow the fluid near the wall. Experience the transition from laminar (Blasius solution) to turbulent flow at the critical Reynolds number Re_x ≈ 5×10^5. 8. Magnus Effect Visualize the asymmetric flow and lift force around a spinning cylinder. Understand the physics behind curveballs in baseball, banana kicks in soccer, and slice shots in golf. 9. Darcy's Law [NEW] Visualize slow flow through a porous medium such as sand or rock. Adjust permeability, pressure gradient, and porosity to experience the law q = (k/μ)·∇P that governs groundwater, oil reservoirs, filters, and soil seepage. 10. Surface Wave [NEW] Visualize free-surface gravity waves. As the depth-to-wavelength ratio changes, particle orbits transition smoothly from circles (deep water) to flattened ellipses (shallow water). Directly observe the Airy dispersion relation ω^2 = gk·tanh(kh). [Features] - Real-time parameter adjustment for all simulations - Live physics formulas and numerical values - Japanese / English support - Dark mode / Light mode - Clean, intuitive UI [Monetization & Ads] - This app is free to download and use - No in-app purchases, no subscriptions, no paid unlocks - A banner ad (Google AdMob) is shown at the bottom of the screen - On iOS, personalized ads are only delivered after the user grants App Tracking Transparency (ATT) permission [Recommended for] - Students studying fluid dynamics in physics class - Anyone who wants to intuitively understand the behavior of flow - Teachers looking for interactive teaching materials - Anyone interested in aeronautical engineering or fluid mechanics
Screenshots
Verdict
The clearest difference is update cadence: RYURAKU at weekly against 日常物理's every 28 months. RYURAKU also leads on device support and iOS requirement (13.0 vs 16.0). On price and in-app purchases 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.
日常物理 ships an update every 28 months, RYURAKU weekly. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.
| Parameter | 日常物理 | RYURAKU |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 28 months | Weekly — better |
| Ads | — | Yes |
| In-app purchases | No | No |
| Devices | — | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Shosuke Sato | Fuji Bit Inc. |
In-app purchases
日常物理
No in-app purchases
RYURAKU
No in-app purchases









