# Neuro Assistant vs Keyhole Puzzle

The clearest difference is price: Keyhole Puzzle at Free against Neuro Assistant's $6.99. Neuro Assistant's advantage is update cadence (weekly vs every 2 weeks) and iOS requirement (14.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

Keyhole Puzzle is free to download; Neuro Assistant costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Neuro Assistant ships an update weekly, Keyhole Puzzle every 2 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Neuro Assistant | Keyhole Puzzle |
| --- | --- | --- |
| Price | $6.99 | **Free** |
| Rating | **[4.5 (12 ratings)](https://appshunter.io/ios/app/neuro-assistant/id1281702932/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 weeks |
| Monetization | Paid | — |
| Size | 64 MB | 1 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Neuraxis AB](https://appshunter.io/developer/1281702931) | [順天堂大学](https://appshunter.io/developer/1080910962) |

## What reviewers say

### Neuro Assistant

[App page](https://appshunter.io/ios/app/neuro-assistant/id1281702932)

This medical app provides quick access to essential neurology, neurosurgery, and neuroradiology information. It features searchable references for stroke syndromes, nerves, anatomy, and drug information, along with calculators and summaries for clinical practice.

**Highlights:** Stroke syndromes reference, Nerve and anatomy reference, Drug pharmacokinetics and dosing, Clinical summaries and algorithms, Medical calculators, Searchable content

**Features:** macOS Compatibility

**In-app purchases:** none


### Keyhole Puzzle

[App page](https://appshunter.io/ios/app/keyhole-puzzle/id6757695861)

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

**In-app purchases:** none


## Frequently asked questions

### Is Neuro Assistant free?

Neuro Assistant costs $6.99, with no in-app purchases.

### Is Keyhole Puzzle free?

Keyhole Puzzle is free to download, with no in-app purchases.

### Do Neuro Assistant or Keyhole Puzzle have ads?

Neither Neuro Assistant nor Keyhole Puzzle shows ads.

### Which is updated more often, Neuro Assistant or Keyhole Puzzle?

Neuro Assistant ships an update weekly, and Keyhole Puzzle every 2 weeks. Most recently, Neuro Assistant was updated on November 3, 2026 and Keyhole Puzzle on October 31, 2026.

---

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