# Protozoan Identification vs Action Potentials

The clearest difference is rating: Action Potentials at 4.7 against Protozoan Identification's 2.0. Action Potentials also leads on update cadence (every 3 weeks vs every 15 months) and ratings volume (13 vs 1). On price, ads, in-app purchases and monetization model 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 holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Action Potentials has 13 ratings behind it against 1, so its average is the more settled of the two.

Protozoan Identification ships an update every 15 months, Action Potentials every 3 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Protozoan Identification | Action Potentials |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/protozoan-identification/id506715288/reviews) | **[4.7 (13 ratings)](https://appshunter.io/ios/app/action-potentials/id1527893283/reviews)** |
| Number of ratings | 1 | **13** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 221 MB | 1 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carolina Biological Supply](https://appshunter.io/developer/413708533) | [Beau Forest](https://appshunter.io/developer/1527893285) |

## What reviewers say

### Protozoan Identification

[App page](https://appshunter.io/ios/app/protozoan-identification/id506715288)

Explore a collection of protozoan images and videos. Features an interactive key, labeling activities, and practice exercises to aid in identification and study.

**Highlights:** Interactive dichotomous key, Labeling activities, Protozoan images and videos, Practice exercises, Study aids

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Protozoan Identification free?

Protozoan Identification is free to download, with no in-app purchases.

### Is Action Potentials free?

Action Potentials is free to download, with no in-app purchases.

### Which has better reviews, Protozoan Identification or Action Potentials?

Action Potentials is rated higher. Protozoan Identification averages 2.0 out of 5 from 1 ratings, while Action Potentials averages 4.7 from 13 ratings.

### Do Protozoan Identification or Action Potentials have ads?

Neither Protozoan Identification nor Action Potentials shows ads.

### Which is updated more often, Protozoan Identification or Action Potentials?

Protozoan Identification ships an update every 15 months, and Action Potentials every 3 weeks. Most recently, Protozoan Identification was updated on November 6, 2026 and Action Potentials on November 3, 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.*