# TNMaker vs OhStem App

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.

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.

## The numbers

| Metric | TNMaker | OhStem App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (27 ratings)](https://appshunter.io/ios/app/tnmaker-multiple-choice-test/id1296263059/reviews)** | — |
| Number of ratings | **27** | — |
| Positive reviews | 55.6% of reviews | **66.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 4 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 15 MB | 46 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vinh Le](https://appshunter.io/developer/1290896744) | [ADT EDUCATION TECHNOLOGY COMPANY LIMITED](https://appshunter.io/developer/1538320096) |

## What reviewers say

### TNMaker

[App page](https://appshunter.io/ios/app/tnmaker-multiple-choice-test/id1296263059)

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.

**Highlights:** Automated multiple-choice test grading, Camera-based scanning, Customizable number of questions, Configurable scoring per question, Review and sharing of results, Downloadable answer sheets

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month | $0.99 | one-time |
| 6 months | $2.99 | one-time |
| 3 months | $2.99 | one-time |
| 12 months | $4.99 | one-time |
| Unlimited | $7.99 | one-time |


### OhStem App

[App page](https://appshunter.io/ios/app/ohstem-app/id1540805396)

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.

**Highlights:** Step-by-step assembly guides, Bluetooth robot control, Drag-and-drop programming interface, Customizable control panel design, Interactive programming lessons

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TNMaker free?

TNMaker is free to download, with in-app purchases available.

### Is OhStem App free?

OhStem App is free to download, with no in-app purchases.

### Do TNMaker or OhStem App have ads?

Neither TNMaker nor OhStem App shows ads.

### Which is updated more often, TNMaker or OhStem App?

TNMaker ships an update weekly, and OhStem App every 4 weeks. Most recently, TNMaker was updated on October 8, 2026 and OhStem App on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*