# Oovium vs VFNotes

The clearest difference is price: Oovium at Free against VFNotes's $19.99. Oovium also leads on in-app purchases (none vs 3). VFNotes's advantage is iOS requirement (15.0 vs 17.0). On update cadence, ads and device support there is nothing between them.

Oovium is free to download; VFNotes costs $19.99 up front. VFNotes sells 3 in-app purchases, starting at $4.99 per month. Oovium asks for nothing beyond the download.

Oovium ships an update every 6 weeks, VFNotes every 5 weeks. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Oovium | VFNotes |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 5 weeks** |
| Monetization | Free | — |
| Size | 10 MB | 25 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Aepryus Software](https://appshunter.io/developer/336573331) | [Fazhan ltd.](https://appshunter.io/developer/1706072792) |

## 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


### VFNotes

[App page](https://appshunter.io/ios/app/vfnotes/id6464467354)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access | $4.99 | per month |
| Yearly Access | $29.99 | per year |
| Lifetime Access | $49.99 | one-time |


## Frequently asked questions

### Is Oovium free?

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

### Is VFNotes free?

VFNotes costs $19.99, and also offers in-app purchases.

### Do Oovium or VFNotes have ads?

Neither Oovium nor VFNotes shows ads.

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

Oovium ships an update every 6 weeks, and VFNotes every 5 weeks. Most recently, Oovium was updated on October 8, 2026 and VFNotes on October 11, 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.*