Participant Id vs Notel
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Participant Id
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This open-source app aims to support psychological research and protect study participants' privacy by generating secure, anonymous, and stable Participant IDs. # Secure To safeguard your data, we employ the industry-standard encryption method MD5. MD5 is a widely used cryptographic hash function that converts your information into a unique alphanumeric string. It ensures that your data remains confidential and tamper-proof. Once your information is encrypted, the resulting hash is irreversible. This means that the original data cannot be derived from the hash. There is no way to reverse-engineer the original data from the hash. # Anonymous To guarantee privacy, no data is stored or sent over the internet. This app converts your data into a Participant ID without any of it leaving your device. Nobody but you will ever find out what you have entered. You can even turn off your internet access while using the app to be extra safe. # Reproducible & Stable The same inputs will always produce the same Participant ID, and we explicitly selected all questions to have stable answers over time for adults. You don't need to remember your ID because you, and only you, can re-generate it anytime. # Open Source This app is fully open-source, and the entire codebase is available for public scrutiny on GitHub: https://github.com/MoodPatterns/participant_id This means you have the freedom to review, inspect, and verify the code yourself to gain confidence in its security and reliability.
Notel
This platform provides a secure way to manage and share digital content with granular control over access and usage. It prevents copying, downloading, and redistribution, offering a robust solution for individuals and businesses to protect their digital assets.
- Secure digital content management
- Controlled access and usage
- Prevents copying and downloading
- Protects against redistribution
- Flexible digital solution
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Notel is a secure digital platform for managing and accessing protected digital content for individuals, companies, and content creators. It allows digital files to be shared with full control over access and usage, while protecting content and preventing copying, downloading, or redistribution. Notel is not just a note-taking app, but a flexible digital solution for various use cases, and it may be the first platform in the world to offer this level of features.
Screenshots
Verdict
The clearest difference is update cadence: Notel at monthly against Participant Id's every 19 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.
Participant Id ships an update every 19 months, Notel monthly. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.
| Parameter | Participant Id | Notel |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 19 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 23 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Bernhard Piskernik | EXCEED DIMENSIONS CONSULTING AND TECHNOLOGY |
In-app purchases
Participant Id
No in-app purchases
Notel
No in-app purchases
Questions
Is Participant Id free?
Is Notel free?
Do Participant Id or Notel have ads?
Which is updated more often, Participant Id or Notel?
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