# Sankey Diagram vs ModTest Pro

The clearest difference is iOS requirement: ModTest Pro at 13.0 against Sankey Diagram's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Sankey Diagram costs $9.99 and ModTest Pro $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Sankey Diagram ships an update every 6 weeks, ModTest Pro every 2 months. The most recent releases landed on September 25, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Sankey Diagram | ModTest Pro |
| --- | --- | --- |
| Price | $9.99 | $9.99 |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/sankey-diagram/id866376517/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 44.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Monetization | Paid | — |
| Size | 1 MB | 26 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [squishLogic](https://appshunter.io/developer/353387502) | [Dohmann Engineering Services](https://appshunter.io/developer/401682475) |

## What reviewers say

### Sankey Diagram

[App page](https://appshunter.io/ios/app/sankey-diagram/id866376517)

Create professional Sankey diagrams to visualize flows and proportions. Easily add sources, sinks, and edit elements interactively. Export your diagrams as PDF or PNG, or share editable files with other users.

**Highlights:** Interactive Sankey diagram creation, Adjustable flow sources and sinks, Node and flow editing, Color customization, Export to PDF and PNG, Shareable editable files, Import data from CSV

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

**In-app purchases:** none


### ModTest Pro

[App page](https://appshunter.io/ios/app/modtest-pro/id1552784932)

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

**In-app purchases:** none


## Frequently asked questions

### Is Sankey Diagram free?

Sankey Diagram costs $9.99, with no in-app purchases.

### Is ModTest Pro free?

ModTest Pro costs $9.99, with no in-app purchases.

### Do Sankey Diagram or ModTest Pro have ads?

Neither Sankey Diagram nor ModTest Pro shows ads.

### Which is updated more often, Sankey Diagram or ModTest Pro?

Sankey Diagram ships an update every 6 weeks, and ModTest Pro every 2 months. Most recently, Sankey Diagram was updated on September 25, 2026 and ModTest Pro on September 8, 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.*