# zeroStudy vs SparkGlow

The clearest difference is in-app purchases: zeroStudy at none against SparkGlow's 4. zeroStudy also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.2). On price, update cadence and ads there is nothing between them.

Both are free to download. SparkGlow sells 4 in-app purchases, starting at $2.99 per month. zeroStudy asks for nothing beyond the download.

zeroStudy ships an update daily, SparkGlow every 2 days. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | zeroStudy | SparkGlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 days |
| Size | 32 MB | 29 MB |
| Requires iOS | **15.1** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [JIA JIUN Ku](https://appshunter.io/developer/1884246557) | [Yu Chen Huang](https://appshunter.io/developer/6793047805) |

## What reviewers say

### zeroStudy

[App page](https://appshunter.io/ios/app/zerostudy/id6760388575)

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

**In-app purchases:** none


### SparkGlow

[App page](https://appshunter.io/ios/app/sparkglow/id6793047803)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SparkGlow Pro Monthly | $2.99 | per month |
| SparkGlow Max Monthly | $4.99 | per month |
| SparkGlow Pro Yearly | $29.99 | per year |
| SparkGlow Max Yearly | $39.99 | per year |


## Frequently asked questions

### Is zeroStudy free?

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

### Is SparkGlow free?

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

### Do zeroStudy or SparkGlow have ads?

Neither zeroStudy nor SparkGlow shows ads.

### Which is updated more often, zeroStudy or SparkGlow?

zeroStudy ships an update daily, and SparkGlow every 2 days. Most recently, zeroStudy was updated on September 29, 2026 and SparkGlow on September 26, 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.*