# Calliope mini vs Viana 2

The clearest difference is monetization model: Calliope mini at free against Viana 2's paid. Calliope mini also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.4). Viana 2's advantage is review sentiment (42% vs 26%). On price, update cadence, ads and in-app purchases there is nothing between them.

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, Viana 2 every 2 months. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Calliope mini | Viana 2 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.6% of reviews | **42.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | **Free** | Paid |
| Size | 37 MB | 19 MB |
| Requires iOS | **15.0** | 17.4 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Calliope gGmbH](https://appshunter.io/developer/1309545544) | [Freie Universitaet Berlin](https://appshunter.io/developer/1031084427) |

## What reviewers say

### Calliope mini

[App page](https://appshunter.io/ios/app/calliope-mini/id1309545545)

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.

**Highlights:** Program micro-controller, Build robots, Transmit messages, Control LEDs, Use motion sensor, Bluetooth communication

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Viana 2

[App page](https://appshunter.io/ios/app/viana-2/id1554845327)

This app allows users to record and analyze motion from videos. It automatically determines the trajectory, position, and velocity of objects, offering advanced graphing and coordinate system tools for physics education.

**Highlights:** Record and analyze motion from videos, Automatic trajectory, position, and velocity determination, Adjustable video frame rates, Object tracking with marker adjustment, Display up to three graph types simultaneously, New phase diagram types, Real-time coordinate system and graph comparison, Export and import projects

**In-app purchases:** none


## Frequently asked questions

### Is Calliope mini free?

Calliope mini is free to download, with no in-app purchases.

### Is Viana 2 free?

Viana 2 is free to download, with no in-app purchases.

### Do Calliope mini or Viana 2 have ads?

Neither Calliope mini nor Viana 2 shows ads.

### Which is updated more often, Calliope mini or Viana 2?

Calliope mini ships an update every 3 months, and Viana 2 every 2 months. Most recently, Calliope mini was updated on October 20, 2026 and Viana 2 on October 19, 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.*