# Flowdia Diagrams vs Best Proportion Calc

The clearest difference is review sentiment: Best Proportion Calc at 100% against Flowdia Diagrams's 54%. Best Proportion Calc also leads on rating (5.0 vs 3.4) and in-app purchases (none vs 1). Flowdia Diagrams's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Flowdia Diagrams sells 1 one-off in-app purchase. Best Proportion Calc asks for nothing beyond the download.

Best Proportion Calc holds the better App Store score, 5.0 against 3.4. That said, the two scores are not equally well evidenced: Flowdia Diagrams has 67 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 54% of Flowdia Diagrams's written reviews are positive against 100% of Best Proportion Calc's.

Flowdia Diagrams ships an update every 2 weeks, Best Proportion Calc every 2 months. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Flowdia Diagrams | Best Proportion Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.4 (67 ratings)](https://appshunter.io/ios/app/flowdia-diagrams/id1170864140/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/best-proportion-calc/id6474536406/reviews)** |
| Number of ratings | **67** | 5 |
| Positive reviews | 54.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 24 MB | 4 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Behzad Gorimar](https://appshunter.io/developer/1125854088) | [Denis Belmont](https://appshunter.io/developer/1174113984) |

## What reviewers say

### Flowdia Diagrams

[App page](https://appshunter.io/ios/app/flowdia-diagrams/id1170864140)

Create professional flowcharts, mind maps, and various other diagrams with an intuitive interface. Easily connect shapes, add elements, and customize your designs. Export your work in multiple formats, including PNG, JPG, PDF, and SVG.

**Highlights:** Create flowcharts, mind maps, BPMN, and network diagrams, Intuitive shape connection and element addition, Customizable shape appearance, Export to PNG, JPG, PDF, and SVG, Import custom images, Supports various UML diagram types

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Premium | $9.99 | one-time |


### Best Proportion Calc

[App page](https://appshunter.io/ios/app/best-proportion-calc/id6474536406)

Easily solve proportion problems with a simple and intuitive interface. This app uses the cross product method for quick and accurate calculations across various fields like finance and science. It's available offline and free to use.

**Highlights:** Intuitive proportion calculation, Cross product method for solving equations, Versatile for finance, science, and more, Offline functionality, Free to use

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flowdia Diagrams free?

Flowdia Diagrams is free to download, with in-app purchases available.

### Is Best Proportion Calc free?

Best Proportion Calc is free to download, with no in-app purchases.

### Which has better reviews, Flowdia Diagrams or Best Proportion Calc?

Best Proportion Calc is rated higher. Flowdia Diagrams averages 3.4 out of 5 from 67 ratings, while Best Proportion Calc averages 5.0 from 5 ratings.

### Do Flowdia Diagrams or Best Proportion Calc have ads?

Best Proportion Calc shows ads; Flowdia Diagrams does not.

### Which is updated more often, Flowdia Diagrams or Best Proportion Calc?

Flowdia Diagrams ships an update every 2 weeks, and Best Proportion Calc every 2 months. Most recently, Flowdia Diagrams was updated on November 11, 2026 and Best Proportion Calc on November 4, 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.*