MindSampler vs NotMyPii
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MindSampler
Participate in scientific research by answering short questions and experiments throughout your day. Contribute to understanding human thought, feelings, and behavior.
- Contribute to scientific understanding
- Receive daily experiment notifications
- Answer short questions
- Enter study codes
- Track daily life insights
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Help scientists understand how people think, feel, and behave as they go about their daily lives. Enter your study code and start receiving notifications throughout the day with short experiments or questions to answer.
NotMyPii
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NotMyPii verifies your age using your ECG waveform from Apple Watch — not a government ID, not a face scan, not a username. Open the link from a partner site on your iPhone, place your finger on the Apple Watch Digital Crown for 30 seconds, and receive a signed verification result. Your ECG is processed in memory and never stored. No account is created. No personal information is collected. Requires iPhone and Apple Watch Series 4 or later.
Screenshots
Verdict
The clearest difference is update cadence: NotMyPii at daily against MindSampler's every 2 months. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MindSampler ships an update every 2 months, NotMyPii daily. The most recent releases landed on June 5, 2026 and September 14, 2026 respectively.
| Parameter | MindSampler | NotMyPii |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (4 ratings) — better | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 2 months | Daily — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 52 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | MindSampler Inc. | Kyle Huscher |
In-app purchases
MindSampler
No in-app purchases
NotMyPii
No in-app purchases
