# Oovium vs BastionChat

The clearest difference is price: Oovium at Free against BastionChat's $9.99. Oovium also leads on update cadence (every 6 weeks vs every 6 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Oovium is free to download; BastionChat costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Oovium ships an update every 6 weeks, BastionChat every 6 months. The most recent releases landed on October 17, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Oovium | BastionChat |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/oovium/id336573328/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 64.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 10 MB | 79 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Aepryus Software](https://appshunter.io/developer/336573331) | [Frederic Ayala Heinrich](https://appshunter.io/developer/1823688846) |

## What reviewers say

### Oovium

[App page](https://appshunter.io/ios/app/oovium/id336573328)

This app is a novel calculation sandbox that combines the functionality of calculators, spreadsheets, concept maps, and programming languages into a single, visually intuitive interface. It aims to make complex computing abilities accessible to a wider audience through explicit visual representations.

**Highlights:** Calculation sandbox, Visual programming interface, Spreadsheet functionality (GridBub), Concept mapping (TextBub), Custom function definition (MechBub), Object instances (InstBub)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative concept
- 💡 Creative approach to calculations
- 💡 Visualizing problems and solutions
- 💡 Useful for prototyping and debugging
- 💡 Good for "what-if" analysis

**What reviewers complain about**

- 🐛 Poor documentation
- 🐛 Trial and error learning curve
- 🐛 Mac version unclear
- 🐛 Subscription too expensive
- 🐛 Apple-exclusive

**Reported bugs**

- Subscription not working
- Crashes on launch on iPad
- Links to Dropbox no longer work
- Update killed everything, crashes on first screen
- Crashes regularly

**Requested features**

- Better terminology
- Vastly better documentation
- Pay-once option
- Lower purchase price ($3.99 or less)
- Graphing and graphics capabilities


### BastionChat

[App page](https://appshunter.io/ios/app/bastionchat/id6747981691)

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

**In-app purchases:** none


## Frequently asked questions

### Is Oovium free?

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

### Is BastionChat free?

BastionChat costs $9.99, with no in-app purchases.

### Do Oovium or BastionChat have ads?

Neither Oovium nor BastionChat shows ads.

### Which is updated more often, Oovium or BastionChat?

Oovium ships an update every 6 weeks, and BastionChat every 6 months. Most recently, Oovium was updated on October 17, 2026 and BastionChat on October 5, 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.*