Comparison

Neuro Assistant vs Keyhole Puzzle

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

Head to head
About

Neuro Assistant

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
Read full description

The aim of this application is to assist in the everyday neurology, neurosurgery or neuroradiology practice by providing updated, correct, easily accessible and searchable content. Neuro Assistant includes, among other features: - Stroke syndromes reference, organised per-vessel. - Cranial and peripheral nerves reference. - Arterial perfusion and dermatome maps. - Detailed anatomy reference of cerebral arteries and veins. - Pharmacokinetics, dosing recommendations, interactions of all antiplatelet, anticoagulant, antiepileptic and antiparkinsonian drugs. - High-yield short summaries on various topics such as emergencies, reference values, treatment algorithms, etc. - Multiple calculators for risk assessment, grading, diagnosis and classification of numerous conditions. Results from calculators can be easily emailed at a tap of a button.

About

Keyhole Puzzle

Features
Read full description

Keyhole Puzzle is a puzzle where you match the shape displayed on the screen to the “keyhole” shape below. You can play with just one finger. Trace the displayed shape to move it, and align it perfectly with the keyhole to advance to the next puzzle. The gameplay is very simple. Drag the shape displayed above and position it so it fits perfectly into the keyhole below. When the shape matches, you automatically advance to the next puzzle. It's a simple shape-matching puzzle with easy-to-use controls.

Screenshots

Neuro Assistant4 screens
Keyhole Puzzle4 screens

Verdict

The call

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.

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

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
Neuro Assistant versus Keyhole Puzzle: the parameters behind the verdict, then further details
ParameterNeuro AssistantKeyhole Puzzle
Price$6.99Free — better
Rating4.5 (12 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings12 — better—
Update frequencyWeekly — betterEvery 2 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.0
Further details — not scored
Size64 MB1 MB
Age rating17+4+
DeveloperNeuraxis AB順天堂大学

In-app purchases

None

Neuro Assistant

No in-app purchases

None

Keyhole Puzzle

No in-app purchases

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.

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