Comparison

Action Potentials vs Ket Steps

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

Head to head
About

Action Potentials

Explore the mechanics of action potentials in real-time. Adjust parameters and introduce various drugs to observe their impact on neuronal signaling. Choose between single event simulations or continuous manual current injections.

Highlights
  • Real-time action potential visualization
  • Adjustable simulation parameters
  • Drug effect simulation (lidocaine, tetrodotoxin, TEA)
  • Single action potential mode
  • Continuous manual current injection
Features
Read full description

In this app, you can see how action potentials work by watching the action potential as it happens and adjusting the parameters. You can add drugs such as lidocaine, tetrodotoxin, and TEA to observe the effects on the action potential. You have the option to see a single action potential with a preset current injection, or a continuous option where you can manually inject current to trigger an action potential.

About

Ket Steps

Features
Read full description

Ket Steps is a symbolic workpad for quantum states. Define kets, bras, and operators in standard bra-ket notation, compose them, and get exact results (fractions, imaginary units, and ...) without numeric approximation unless you ask for it. Each line is a typed, labeled object. Select two, apply an operation, and the result appears contrasted against the input for quick validation, not just the answer. Every result exports to LaTeX with a single tap. **What it does today** Single- and multi-qubit states, tensor products, standard operators (Pauli X/Y/Z, Hadamard, and more), inner products, outer products, and operator-ket application. Exact symbolic arithmetic throughout. Norm validation on every state. A growing library of named objects to insert with one tap. **Where it's going** Ket Steps aims to become a complete toolkit for quantum information theory. Join our Kets on their journey. **Privacy** Everything stays on your device. No data is collected, transmitted, or stored anywhere else.

Screenshots

Action Potentials3 screens
Ket Steps4 screens

Verdict

The call

The clearest difference is iOS requirement: Action Potentials at 13.0 against Ket Steps's 18.0. On price, update cadence, ads 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

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

Action Potentials ships an update every 3 weeks, Ket Steps every 2 weeks. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

Scorecard1 real difference · 8 level
Action Potentials versus Ket Steps: the parameters behind the verdict, then further details
ParameterAction PotentialsKet Steps
PriceFreeFree
Rating4.7 (13 ratings) — better—
Number of ratings13 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size1 MB7 MB
Age rating4+4+
DeveloperBeau ForestYARON AMIR BENJAMIN DR. GOLDSTEIN

In-app purchases

None

Action Potentials

No in-app purchases

None

Ket Steps

No in-app purchases

Questions

Is Action Potentials free?
Action Potentials is free to download, with no in-app purchases.
Is Ket Steps free?
Ket Steps is free to download, with no in-app purchases.
Do Action Potentials or Ket Steps have ads?
Neither Action Potentials nor Ket Steps shows ads.
Which is updated more often, Action Potentials or Ket Steps?
Action Potentials ships an update every 3 weeks, and Ket Steps every 2 weeks. Most recently, Action Potentials was updated on November 3, 2026 and Ket Steps on November 9, 2026.

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