TNMaker vs OhStem App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TNMaker
This app helps educators quickly grade multiple-choice tests using a smartphone camera. It allows for customization of test length and scoring, with immediate review and sharing options.
- Automated multiple-choice test grading
- Camera-based scanning
- Customizable number of questions
- Configurable scoring per question
- Review and sharing of results
- Downloadable answer sheets
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Functions: + TNMaker will be very helpful for teachers to mark for multiple choice test, rather than using their hands or using a dedicated scanner. + Just use the teacher's phone to mark the students' multiple choice test quickly. + The app allows reviewing, sorting, and sharing right away with facebook, zalo, gmail... +The application allows you to customize the number of sentences and give the correct score for each sentence. Usage Guide: - Notice : App need using camera permission and storage permission to read data. - First : You link to https://tnmaker.net or Setting-> AnswerPaper to download the answer sheets (support for sample 50), next you should print in format or scale (small, large). - Key: Used to scan a key. This is the correct answer to compare when scanning. You should fill in the circle and choose only a answer for each sentence. If you are not satisfied, you should rescan or save to complete the your key.You can review your key in Review-> Menu-> Key. - Scan: Use to scan your answer, you should move the camera to the 4 corners of the answer sheets, the red square will blink.The application will detect 4 corners and find the correct answer, the correct answer will be green , the incorrect answer will be red. Notice your will only select a answer, the application will view the correct number of sentences for each sentence and the score you get. Next you should click Back to scan the next answer sheets, if you do not find the square, you should move your camera and adjust them. - Review: You can review to your key or answer, click on the item and review your answer, you can delete and share it with facebook, zalo, gmail by hold in the item. Besides, you can select the menu and have some options, you can sort the list and share it to facebook...It is helpful, your list is too long, you should delete all of them and start a new multiple choice test. - Setting: Support for you with some options, you can choose the number of sentences to your score calculator, there are 20, 40, 50 .Easy to get answer sheets on your phone and watch the video tutorial. - Feedback: We are always trying to complete the application. Any feedback, you can send an email to tracnghiemmaker@gmail.com. Your comments will help more and get better. Email: tracnghiemmaker@gmail.com Website: https://tnmaker.net Privacy Policy: https://tnmaker.net/privacy-policy
OhStem App
This app allows users to control and program STEM robot products. It features step-by-step assembly guides, Bluetooth robot control, and a drag-and-drop programming interface suitable for ages 7-15. Users can also design custom control panels and follow interactive programming lessons.
- Step-by-step assembly guides
- Bluetooth robot control
- Drag-and-drop programming interface
- Customizable control panel design
- Interactive programming lessons
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Ứng dụng điều khiển và lập trình cho các sản phẩm robot và STEM kit phát triển bởi OhStem. Ứng dụng bao gồm nhiều chức năng thú vị giúp cho các bạn tương tác với các sản phẩm STEM thông minh của OhStem. Chức năng: * Hướng dẫn lắp ráp từng bước * Bảng điều khiển robot kết nối thông qua Bluetooth * Giao diện lập trình khối kéo thả phù hợp với lứa tuổi 7-15 * Cho phép tự thiết kế bảng điều khiển theo ý mình * Các bài học hướng dẫn từng bước lập trình tương tác với robot * Ứng dụng hoàn toàn miễn phí. * Giao diện đơn giản, thân thiện, dễ sử dụng, phù hợp với mọi lứa tuổi. Thông tin liên hệ: Công Ty TNHH Công nghệ Giáo dục ADT Hotline: 08.6666.8168 Email: contact@ohstem.vn Địa chỉ: 42B Hồ Bá Phấn, Phước Long A, TP. Thủ Đức, Thành phố Hồ Chí Minh Website: https://ohstem.vn
Screenshots
Verdict
The clearest difference is in-app purchases: OhStem App at none against TNMaker's 5. OhStem App also leads on review sentiment (67% vs 56%) and iOS requirement (11.0 vs 15.0). TNMaker's advantage is update cadence (weekly vs every 4 weeks). On price, ads 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. TNMaker sells 5 one-off in-app purchases. OhStem App asks for nothing beyond the download.
TNMaker ships an update weekly, OhStem App every 4 weeks. The most recent releases landed on October 8, 2026 and October 6, 2026 respectively.
| Parameter | TNMaker | OhStem App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (27 ratings) — better | — |
| Positive reviews | 55.6% of reviews | 66.7% of reviews — better |
| Number of ratings | 27 — better | — |
| Update frequency | Weekly — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | Vinh Le | ADT EDUCATION TECHNOLOGY COMPANY LIMITED |
Customer experience
TNMaker
OhStem App
In-app purchases
TNMaker
- 1 month$0.99
- 6 months$2.99
- 3 months$2.99
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- 12 months$4.99
- Unlimited$7.99
OhStem App
No in-app purchases









