# DoomStudy vs ShadowFlow

The clearest difference is in-app purchases: DoomStudy at none against ShadowFlow's 4. DoomStudy also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ShadowFlow sells 4 in-app purchases, starting at $6.99 per month. DoomStudy asks for nothing beyond the download.

DoomStudy ships an update weekly, ShadowFlow every 5 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | DoomStudy | ShadowFlow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/doomstudy-scroll-to-learn/id6755923722/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Size | 90 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Jalal Fatouaki](https://appshunter.io/developer/1855953539) | [Daichi Tanabe](https://appshunter.io/developer/1895317818) |

## What reviewers say

### DoomStudy

[App page](https://appshunter.io/ios/app/doomstudy-scroll-to-learn/id6755923722)

**Features:** macOS Compatibility

**In-app purchases:** none


### ShadowFlow

[App page](https://appshunter.io/ios/app/shadowflow-speaking-practice/id6790476129)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ShadowFlow Pro (Monthly) | $6.99 | per month |
| ShadowFlow MAX (Monthly) | $14.99 | per month |
| ShadowFlow Pro (Yearly) | $59.99 | per year |
| ShadowFlow MAX (Yearly) | $129.99 | per year |


## Frequently asked questions

### Is DoomStudy free?

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

### Is ShadowFlow free?

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

### Do DoomStudy or ShadowFlow have ads?

Neither DoomStudy nor ShadowFlow shows ads.

### Which is updated more often, DoomStudy or ShadowFlow?

DoomStudy ships an update weekly, and ShadowFlow every 5 days. Most recently, DoomStudy was updated on November 5, 2026 and ShadowFlow on November 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.*