Psychological test vs PPF
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Psychological test
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This is a behaviour self-assessment tool originally based on the emotional and behavioural theory of psychologist William Moulton Marston, which centred on four personality traits: D, I,S, and C. This theory was then developed into a behavioural assessment tool.
PPF
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The OtoVIS Pterygopalatine Fossa (PPF) module offers an immersive and interactive simulation to explore the complex anatomy of the pterygopalatine fossa. This app is designed for medical professionals and students, providing a comprehensive understanding of the neurovascular structures housed in this challenging area of the skull base. Key Features: - Detailed 3D model of the left pterygopalatine fossa - Contextual placement within the endonasal approach - Interactive tools to explore anatomical relationships - Enhanced surgical relevance to expanded endonasal approaches, including the transpterygoid approach and endonasal lateral cavernous sinus approach - Educational content on the potential routes of spread for neoplastic and infectious processes This app is an invaluable tool for anyone looking to deepen their understanding of skull base anatomy, whether for educational purposes or clinical practice. This work is supported by the Karren Family Foundation through the Ohlson Research Initiative at the University of Calgaryβs Cumming School of Medicine.
Screenshots
Verdict
The clearest difference is in-app purchases: PPF at none against Psychological test's 2. PPF also leads on update cadence (fortnightly vs every 6 weeks). Psychological test's advantage is iOS requirement (11.0 vs 15.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Psychological test sells 2 one-off in-app purchases. PPF asks for nothing beyond the download.
Psychological test ships an update every 6 weeks, PPF fortnightly. The most recent releases landed on May 19, 2026 and September 23, 2026 respectively.
| Parameter | Psychological test | PPF |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 weeks | Fortnightly β better |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, iPod β better | iPhone, iPod |
| Requires iOS | 11.0 β better | 15.0 |
| Further details β not scored | ||
| Size | 9 MB | 784 MB |
| Age rating | 4+ | 17+ |
| Developer | Shanghai Aiwa Information Technology Co.,Ltd. | Arthur Volpato Batista |
In-app purchases
Psychological test
- DiSC test$3.99
- Discpay$3.99
PPF
No in-app purchases
Questions
Is Psychological test free?
Is PPF free?
Do Psychological test or PPF have ads?
Which is updated more often, Psychological test or PPF?
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