Comparison

PhysicsGraph vs RYORAKU

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

Head to head
About

PhysicsGraph

Features
Read full description

You can feel Synthetic wave! 1,Tap color you want to move! 2,Tap screen and move wave! 3,BlueWave + RedWave = GreenWave

About

RYORAKU

Features
Read full description

RYORAKU is an interactive educational simulation app that lets you experience quantum mechanics phenomena hands-on. Explore 10 beautifully visualized simulations and discover the mysteries and elegance of quantum physics. 【10 Simulations】 ▶ Wave Function Observe the time evolution of a Gaussian wave packet in real time. The real part, imaginary part, and probability density are displayed in distinct colors. Adjust the wave number and spread to see how the wave function behaves. ▶ Particle in a Box Visualize quantized energy levels inside an infinite square well potential. Change the quantum number n to see how the number of nodes changes and understand that energy is discrete. ▶ Quantum Tunneling Simulate a particle penetrating a potential barrier using numerical solutions of the Schrödinger equation. Vary the barrier height, width, and particle energy to observe changes in transmission probability. ▶ Double Slit Recreate the most famous experiment in quantum mechanics. See the wave interference pattern and particle-by-particle detection histogram simultaneously. Watch as an interference pattern emerges even when particles are detected one at a time. ▶ Uncertainty Principle Display position-space and momentum-space probability distributions side by side, visualizing Heisenberg's uncertainty relation (Δx·Δp ≥ ℏ/2). See how reducing uncertainty in one quantity increases it in the other. ▶ Quantum Entanglement Watch entangled photon pairs being created, flying apart, and being measured with real-time animation. Adjust Alice and Bob's measurement angles to accumulate correlations and experimentally confirm the violation of Bell's inequality (CHSH). Experience quantum correlations that exceed the classical limit of S=2. ▶ Harmonic Oscillator Visualize the quantum harmonic oscillator wave functions using Hermite polynomials. See equally spaced energy levels E_n=ℏω(n+½), the parabolic potential, and understand zero-point energy and classical turning points intuitively. ▶ Hydrogen Atom Display hydrogen atom electron orbitals (1s, 2p, 3d…) as 2D probability density maps. Switch between principal quantum number n, angular momentum l, and magnetic quantum number m with sliders to observe orbital shapes and radial probability distributions. ▶ Stern-Gerlach Recreate the historic 1922 experiment where a beam of neutral atoms passing through an inhomogeneous magnetic field splits into two discrete spots according to spin. Adjust the input Bloch angle θ to control measurement probabilities P(↑)=cos²(θ/2), P(↓)=sin²(θ/2), and watch the screen accumulate spin-up and spin-down deposits — a hands-on demonstration of spin quantization and the Born rule. ▶ Quantum Walk The quantum analogue of the random walk. A particle alternates Hadamard coin operations and position shifts, while the classical random walk is shown side by side. Compare the bimodal, ballistically spreading quantum distribution (σ ∝ t) with the diffusive Gaussian classical distribution (σ ∝ √t) at every step. 【Features】 • Adjust parameters in real time across all simulations • Physics formulas and values displayed in real time • Dark mode / Light mode support • Intuitive and beautiful UI • Only a small banner ad at the bottom 【Who is this for?】 • Students studying quantum mechanics in physics class • Anyone who wants to intuitively understand the quantum world • Teachers looking for classroom tools • Anyone curious about quantum mechanics

Screenshots

PhysicsGraph2 screens
RYORAKU4 screens

Verdict

The call

The clearest difference is ads: PhysicsGraph at none against RYORAKU's shown. PhysicsGraph also leads on iOS requirement (9.0 vs 13.0). 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

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

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 7, 2026 and October 15, 2026 respectively.

Scorecard2 real differences · 4 level
PhysicsGraph versus RYORAKU: the parameters behind the verdict, then further details
ParameterPhysicsGraphRYORAKU
PriceFreeFree
Update frequencyEvery 5 daysEvery 5 days
AdsNo — betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better13.0
Further details — not scored
Size12 MB23 MB
Age rating4+4+
DeveloperYaneurabeyaFuji Bit Inc.

In-app purchases

None

PhysicsGraph

No in-app purchases

None

RYORAKU

No in-app purchases

Questions

Is PhysicsGraph free?
PhysicsGraph is free to download, with no in-app purchases.
Is RYORAKU free?
RYORAKU is free to download, with no in-app purchases.
Do PhysicsGraph or RYORAKU have ads?
RYORAKU shows ads; PhysicsGraph does not.
Which is updated more often, PhysicsGraph or RYORAKU?
PhysicsGraph ships an update every 5 days, and RYORAKU every 5 days. Most recently, PhysicsGraph was updated on October 7, 2026 and RYORAKU on October 15, 2026.

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