Comparison

日常物理 vs RYURAKU

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

Head to head
About

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。

About

RYURAKU

Features
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RYURAKU is an interactive educational simulation app for experiencing fluid dynamics phenomena firsthand. Developer: Fuji Bit Inc. The 6th title in the SUUGAKU / BUTURAKU / DENRAKU / HARAKU / NETURAKU series. The theme is "flow." Discover the wonders of fluid physics through 12 hands-on simulations. 12 simulations in 3 categories: - Flow basics - Streamlines: particles reveal potential flow around a cylinder in a uniform stream. Drag the obstacle and watch the flow field change in real time. - Bernoulli's Principle: flow through a Venturi tube with live pressure gauges. Watch speed rise and pressure drop where the pipe narrows, and see A1v1 = A2v2 at work. - Reynolds Number: laminar-turbulent transition in pipe flow. Adjust speed, viscosity and diameter and see the dramatic change at Re ≈ 2300. - Boundary Layer: a boundary layer growing over a flat plate, from the laminar Blasius solution to turbulent transition at Re_x ≈ 5×10^5. - Darcy's Law: slow flow through porous media such as sand or rock. Adjust permeability, pressure gradient and porosity to experience q = (k/μ)·∇P, the law behind groundwater, oil reservoirs and filters. - Vortices & lift - Vortex: point vortices and their mutual induction. Tap to add a counterclockwise vortex, long-press for clockwise. - Kármán Vortex Street: alternating vortex shedding behind a cylinder, with live Strouhal and Reynolds numbers. - Lift Force: flow around an airfoil and how lift and drag arise. Change the angle of attack or camber and watch the force vectors. - Magnus Effect: asymmetric flow and a sideways force on a spinning cylinder: the physics of curveballs and banana kicks. - Water & gravity - Buoyancy (new): Archimedes' principle. Change the object and fluid densities to find where things float, sink or hang in balance. Drag the object under, let go, and watch it bob until it settles with a submerged fraction of ρ_s/ρ_f. - Torricelli's Law (new): water jetting from a hole in a tank. See the exit speed v = √(2gh), the falling water level and the jet range R = 2√(y₀h). Drag the hole to find the height that throws the water farthest. - Surface Wave: free-surface gravity waves. As the depth-to-wavelength ratio changes, particle orbits shift smoothly from circles (deep water) to flattened ellipses (shallow water). Features: - Real-time parameter adjustment for every simulation - A hint on how to try each screen, plus an explanation with formulas - Live physics formulas and values - Works with large text sizes, landscape, iPad and Split View - Taps and drags can also be done with buttons and sliders (works with VoiceOver and Switch Control) - 16 languages (English, Japanese, Chinese Simplified / Traditional, Korean, Spanish, Portuguese, German, French, Hindi, Indonesian, Russian, Italian, Turkish, Thai, Vietnamese) - Dark mode / Light mode Pricing & ads: - Free. No in-app purchases, subscriptions or paid unlocks - A banner ad (Pangle) is shown at the bottom of the screen - Ads are personalized only if you allow tracking (ATT). You can also turn off personalized ads from "About this app" > "Ad settings" Recommended for: - Students studying fluid dynamics in physics class - Anyone who wants to understand how flow behaves - Teachers looking for interactive teaching materials - Anyone interested in aeronautics or fluid mechanics

Screenshots

日常物理3 screens
RYURAKU4 screens

Verdict

The call

The clearest difference is update cadence: RYURAKU at every 3 weeks against 日常物理's every 28 months. RYURAKU also leads on device support. On price, in-app purchases 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

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

UpkeepUpdate frequency

日常物理 ships an update every 28 months, RYURAKU every 3 weeks. The most recent releases landed on October 10, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 4 level
日常物理 versus RYURAKU: the parameters behind the verdict, then further details
Parameter日常物理RYURAKU
PriceFreeFree
Update frequencyEvery 28 monthsEvery 3 weeks — better
Ads—Yes
In-app purchasesNoNo
Devices—iPhone, iPad, iPod — better
Requires iOS16.015.0 — better
Further details — not scored
Size2 MB26 MB
Age rating4+4+
DeveloperShosuke SatoFuji Bit Inc.

In-app purchases

None

日常物理

No in-app purchases

None

RYURAKU

No in-app purchases

Questions

Is 日常物理 free?
日常物理 is free to download, with no in-app purchases.
Is RYURAKU free?
RYURAKU is free to download, with no in-app purchases.
Which is updated more often, 日常物理 or RYURAKU?
日常物理 ships an update every 28 months, and RYURAKU every 3 weeks. Most recently, 日常物理 was updated on October 10, 2026 and RYURAKU on October 25, 2026.

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