Smart.Grid vs TajTest
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart.Grid
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With Germany and other countries having committed to a process of energy transformation, the amount of renewable generators with fluctuating output is on the increase. In order to make efficient use of this energy originating from sun and wind, novel methods of power system operation are to be conceived. This emerging set of novel methods defines the functionality of the smart grid. Learn about the key players of the smart grid with this app. Play five level, each one introducing one key player with a quiz and a small game. The games transform your iPhone into: 1. A PV-cell 2. A wind energy converter 3. A flexible consumer 4. An ice storage 5. An energy management system Gain an insight into the functionality of a smart grid and learn how the smart grid contributes to a secure and sustainable energy supply.
TajTest
Prepare for the MMT exam with practice tests, detailed explanations, and progress tracking. Explore majors, universities, and admission processes to make informed decisions about your future studies and career.
- Practice MMT tests
- View correct answers and explanations
- Track study progress
- Participate in daily tests and rankings
- Explore majors and universities
- Admission process information
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TajTest is an app for preparing for the NCT exam and choosing an educational path in Tajikistan. Applicants can take tests, learn English vocabulary, get help from TajTest AI and find useful information about admission. With TajTest you can: take practice tests by subject and by cluster; check your answers and read explanations for each question; complete a daily IQ test; learn new English words and test your knowledge; track your history, results and progress; compare your results with other users on the leaderboard; learn more about specialties and universities; discover educational centers and courses; apply to courses that suit you; ask TajTest AI questions about studying and admission. TajTest brings exam preparation and useful information for applicants together in one app. A clean interface helps you study regularly, see your results and find the right field of study faster. Why TajTest: NCT preparation right on your phone; tests across different subjects and clusters; daily tasks and practice; English vocabulary trainer; TajTest AI for study questions; results history and leaderboard; catalog of courses and educational centers; information about universities and specialties. We continuously improve TajTest, fix issues and add new features for preparation and admission. TajTest is an independent educational app and does not represent government authorities or the National Testing Center. Please double-check important admission information with official sources. Start preparing for the NCT with TajTest.
Screenshots
Verdict
The clearest difference is ads: Smart.Grid at none against TajTest's shown. Smart.Grid also leads on device support (3 vs 1) and iOS requirement (9.0 vs 16.4). TajTest's advantage is update cadence (fortnightly vs every 3 months). On price and in-app purchases 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.
Smart.Grid ships an update every 3 months, TajTest fortnightly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | Smart.Grid | TajTest |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 7 MB | 67 MB |
| Age rating | 4+ | 17+ |
| Developer | Technische Universitaet Berlin | Khusravjon Ayubjonov |
In-app purchases
Smart.Grid
No in-app purchases
TajTest
No in-app purchases









