# Action Potentials vs Ket Steps

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.

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

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.

## The numbers

| Metric | Action Potentials | Ket Steps |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/action-potentials/id1527893283/reviews)** | — |
| Number of ratings | **13** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 1 MB | 7 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Beau Forest](https://appshunter.io/developer/1527893285) | [YARON AMIR BENJAMIN DR. GOLDSTEIN](https://appshunter.io/developer/1850455880) |

## What reviewers say

### Action Potentials

[App page](https://appshunter.io/ios/app/action-potentials/id1527893283)

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:** macOS Compatibility

**In-app purchases:** none


### Ket Steps

[App page](https://appshunter.io/ios/app/ket-steps/id6762529698)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*