Calliope mini vs Open Roberta Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calliope mini
This app allows users to program a micro-controller to build robots, transmit messages, and make things move. It features LEDs, buttons, sensors, and Bluetooth for creative coding projects.
- Program micro-controller
- Build robots
- Transmit messages
- Control LEDs
- Use motion sensor
- Bluetooth communication
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With Calliope mini you have countless creative options right at your fingertips. You want to build a robot or transmit messages? With just a few clicks you can create a program for the controller and make things move. Besides 25 red plus three RGB-LEDs and two programmable buttons the board contains a combined position sensor with motion sensor and compass as well as a bluetooth module that allows the Calliope mini to communicate with other devices.
Open Roberta Mobile
Visually program robots and microcontrollers using a drag-and-drop interface. Wirelessly transfer your creations to compatible hardware like LEGO Education WeDo 2.0 via Bluetooth. Explore a gallery of shared programs and access live coding help.
- Visual programming language (NEPO®)
- Robot and microcontroller control
- Wireless Bluetooth transfer
- Program sharing gallery
- Live coding help
- Multi-language support
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Code and play – welcome to the Open Roberta Lab, where you bring robots and microcontrollers to life. By “dragging and dropping” the visual programming language NEPO® you can quickly and playfully create programs for different systems, e.g. the LEGO® Education WeDo 2.0. The “Open Roberta mobile” app enables you to transfer your NEPO programs to the WeDo 2.0 wirelessly via Bluetooth – no matter whether you are using a smartphone or a tablet. Open Roberta comes with many extras • One programming language for many robots • Gallery for sharing programs • Live help for a quick introduction to coding • Source view • Various languages for users worldwide • And many more
Screenshots
Verdict
The clearest difference is update cadence: Open Roberta Mobile at every 2 days against Calliope mini's every 3 months. Open Roberta Mobile also leads on iOS requirement (9.3 vs 15.0). On price, ads, in-app purchases and monetization model 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.
Calliope mini ships an update every 3 months, Open Roberta Mobile every 2 days. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.
| Parameter | Calliope mini | Open Roberta Mobile |
|---|---|---|
| Price | Free | Free |
| Rating | — | 1.7 (3 ratings) — better |
| Positive reviews | 25.6% of reviews | — |
| Number of ratings | — | 3 — better |
| Update frequency | Every 3 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 9.3 — better |
| Further details — not scored | ||
| Size | 37 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Calliope gGmbH | Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung eingetragener Verein |
Customer experience
Calliope mini
Open Roberta Mobile
In-app purchases
Calliope mini
No in-app purchases
Open Roberta Mobile
No in-app purchases
Questions
Is Calliope mini free?
Is Open Roberta Mobile free?
Do Calliope mini or Open Roberta Mobile have ads?
Which is updated more often, Calliope mini or Open Roberta Mobile?
Other comparisons
