WonderArm vs STEM Dotz
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WonderArm
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Connect the device Bluetooth through WonderArm to control the rotation of the robotic arm and download the action group.
STEM Dotz
This app collects and graphs data from a wireless multisensor, offering over 30 guided activities and supporting user-designed scientific explorations. It helps reinforce science understanding and develop critical-thinking skills.
- Data collection from multisensor
- Graphing of collected data
- Over 30 guided activities
- User-designed explorations
- Reinforces science understanding
- Develops critical-thinking skills
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The STEM Dotz® App is a tool for collecting and graphing data from a STEM Dotz wireless multisensor. The STEM Dotz App supports user-designed explorations and includes over 30 guided activities to help you get started. The easy to use STEM Dotz App and wireless multisensor reinforce science understanding and help develop critical-thinking skills. The multisensor includes temperature, pressure, relative humidity, light, acceleration, and magnetic field sensors.
Screenshots
Verdict
The clearest difference is update cadence: WonderArm at fortnightly against STEM Dotz's every 8 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.
WonderArm ships an update fortnightly, STEM Dotz every 8 months. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.
| Parameter | WonderArm | STEM Dotz |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Fortnightly — better | Every 8 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 3 MB | 72 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Hiwonder Technology Co.,Ltd | Stemious Solutions Private Limited |
In-app purchases
WonderArm
No in-app purchases
STEM Dotz
No in-app purchases
Questions
Is WonderArm free?
Is STEM Dotz free?
Do WonderArm or STEM Dotz have ads?
Which is updated more often, WonderArm or STEM Dotz?
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