# Flowdia Diagrams vs Trigonometric Calculation

The clearest difference is in-app purchases: Trigonometric Calculation at none against Flowdia Diagrams's 1. Flowdia Diagrams's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 6 weeks). 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. Trigonometric Calculation asks for nothing beyond the download.

Flowdia Diagrams ships an update every 2 weeks, Trigonometric Calculation every 6 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Flowdia Diagrams | Trigonometric Calculation |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (66 ratings)](https://appshunter.io/ios/app/flowdia-diagrams/id1170864140/reviews)** | — |
| Number of ratings | **66** | — |
| Positive reviews | 54.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 5 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Behzad Gorimar](https://appshunter.io/developer/1125854088) | [Risako Asai](https://appshunter.io/developer/1671273580) |

## 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 |


### Trigonometric Calculation

[App page](https://appshunter.io/ios/app/trigonometric-calculation/id1636196284)

**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 Trigonometric Calculation free?

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

### Do Flowdia Diagrams or Trigonometric Calculation have ads?

Trigonometric Calculation shows ads; Flowdia Diagrams does not.

### Which is updated more often, Flowdia Diagrams or Trigonometric Calculation?

Flowdia Diagrams ships an update every 2 weeks, and Trigonometric Calculation every 6 weeks. Most recently, Flowdia Diagrams was updated on October 24, 2026 and Trigonometric Calculation on October 13, 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.*