# Xylem Parent App vs PlanB

The clearest difference is ads: PlanB at none against Xylem Parent App's shown. PlanB also leads on update cadence (every 2 weeks vs every 7 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Xylem Parent App ships an update every 7 months, PlanB every 2 weeks. The most recent releases landed on September 8, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Xylem Parent App | PlanB |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Size | 71 MB | 51 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [XYLEM LEARNING PRIVATE LIMITED](https://appshunter.io/developer/1651563286) | [Shamil PP](https://appshunter.io/developer/1890517618) |

## What reviewers say

### Xylem Parent App

[App page](https://appshunter.io/ios/app/xylem-parent-app/id6742320327)

**In-app purchases:** none


### PlanB

[App page](https://appshunter.io/ios/app/planb-for-exams/id6761900749)

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

**In-app purchases:** none


## Frequently asked questions

### Is Xylem Parent App free?

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

### Is PlanB free?

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

### Do Xylem Parent App or PlanB have ads?

Xylem Parent App shows ads; PlanB does not.

### Which is updated more often, Xylem Parent App or PlanB?

Xylem Parent App ships an update every 7 months, and PlanB every 2 weeks. Most recently, Xylem Parent App was updated on September 8, 2026 and PlanB on September 4, 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.*