# Study91Pro vs Parent App by PlanetSpark

The clearest difference is in-app purchases: Parent App by PlanetSpark at none against Study91Pro's 10. Parent App by PlanetSpark also leads on update cadence (every 6 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Study91Pro sells 10 one-off in-app purchases. Parent App by PlanetSpark asks for nothing beyond the download.

Study91Pro ships an update every 4 months, Parent App by PlanetSpark every 6 weeks. The most recent releases landed on September 8, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Study91Pro | Parent App by PlanetSpark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 144 MB | 55 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Online Learning](https://appshunter.io/developer/1790866777) | [Kunal Malik](https://appshunter.io/developer/1610156743) |

## What reviewers say

### Study91Pro

[App page](https://appshunter.io/ios/app/study91pro/id6475599028)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AQ | $29.99 | one-time |
| Package - AU | $34.99 | one-time |
| Package - AV | $34.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - AX | $39.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - BE | $44.99 | one-time |
| Package - BH | $49.99 | one-time |
| Package - BF | $49.99 | one-time |


### Parent App by PlanetSpark

[App page](https://appshunter.io/ios/app/parent-app-by-planetspark/id6748634068)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Study91Pro free?

Study91Pro is free to download, with in-app purchases available.

### Is Parent App by PlanetSpark free?

Parent App by PlanetSpark is free to download, with no in-app purchases.

### Do Study91Pro or Parent App by PlanetSpark have ads?

Neither Study91Pro nor Parent App by PlanetSpark shows ads.

### Which is updated more often, Study91Pro or Parent App by PlanetSpark?

Study91Pro ships an update every 4 months, and Parent App by PlanetSpark every 6 weeks. Most recently, Study91Pro was updated on September 8, 2026 and Parent App by PlanetSpark on September 29, 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.*