Mind Tracker BCI vs SDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mind Tracker BCI
This app analyzes brain activity waves to provide insights into productivity, stress levels, and emotional states. It helps users understand their brain's workload and develop emotional resilience through biofeedback training.
- Individual Alpha Peak Frequency (iAPF) determination
- Real-time brain workload analysis
- Identification of psycho-emotional states
- Attitude towards tasks tracking
- Stress resilience training with biofeedback
- Productivity rhythm establishment
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For whom? If you wish to multiply your personal productivity and efficiency, while hoping to get rid of disturbing thoughts that keep you awake at night — the Mind Tracker app and BCI devices are just what you need. How does it work? Neurons constantly generate electrical signals called brain activity waves. The sensors of devices read these waves, and the BCI Mind Tracker app decodes the signal into the metrics easy to understand. We call this the brain control panel. On the one hand, Mind Tracker enables real-time and retrospective analysis of brain activity through convenient dashboards. On the other hand, it serves as a tool for enhancing personal productivity and stress resilience. What can the Mind Tracker do? 1. The BCI Mind Tracker determines the user’s individual Alpha Peak Frequency (iAPF). IAPF is a genetically determined intrinsic feature of brain activity that is responsible for a person’s behavioral pattern It is measured within the frequency of 7 to 13 Hz. Alpha peak is gauged by Mind Tracker in just 2 minutes. iAPF values in Hz determine inclination to certain social roles, such as: - creative people (7–9.5 Hz) - managers (9.5–10.5 Hz) - engineers (10.5–13 Hz) 2. It shows the brain's workload level with tasks in real-time. 3. The tracker identifies the user's current psycho-emotional state: - engagement; - relaxation; - fatigue; - anxiety; - stress. 4 It displays the user's attitude towards the task they are currently solving: the level of focus, calmness, or tension. 5. The Mind Tracker BCI helps to get rid of anxious thoughts and become more emotionally resilient. Emotional resilience is the ability to not react to external irritants. It develops alongside the skill of controlling one's own alpha brainwave rhythm. The Stress Resistance alpha training course with biofeedback helps individuals learn how to control their alpha waves, maintaining a high alpha rhythm frequency during work, learning, or when tackling other complex tasks. 6. The Productivity feature helps establish an individual productive work rhythm. The Mind Tracker BCI app shows when the brain is tired and determines the minimum required time for the brain to return to a productive state. Scientific research: The technology for the Mind Tracker BCI app is based on research of individual Alpha Peak Frequency, the Klimesch fatigue index, and the biotech lab's own scientific developments.
SDay
Simplify your life and enhance productivity with this straightforward application. It aims to cut through complexity, offering tools to help you achieve more. Designed for ease of use, it focuses on improving daily routines.
- Life improvement tools
- Productivity boost
- Simplified interface
- Focus on daily routines
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A super-simple app to improve your life and boost your productivity in a world that is too complicated.
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Verdict
The clearest difference is review sentiment: SDay at 96% against Mind Tracker BCI's 0%. SDay also leads on rating (5.0 vs 1.0) and ratings volume (3 vs 1). Mind Tracker BCI's advantage is in-app purchases (none vs 2) and update cadence (every 2 weeks vs monthly). On price, ads and iOS requirement 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. SDay sells 2 in-app purchases, starting at $4.99 per month. Mind Tracker BCI asks for nothing beyond the download.
SDay holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 0% of Mind Tracker BCI's written reviews are positive against 96% of SDay's.
Mind Tracker BCI ships an update every 2 weeks, SDay monthly. The most recent releases landed on September 10, 2026 and September 26, 2026 respectively.
| Parameter | Mind Tracker BCI | SDay |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | 95.8% of reviews — better |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 2 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPod |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 297 MB | 54 MB |
| Age rating | 4+ | 17+ |
| Developer | BRAINBIT INC. | Kirill Karavaev |
Customer experience
Mind Tracker BCI
SDay
In-app purchases
Mind Tracker BCI
No in-app purchases
SDay
- SDay Pro Monthly$4.991 Month
- SDay Pro Annual$49.991 Year









