# Perimeter vs Greybobby

The clearest difference is iOS requirement: Perimeter at 13.4 against Greybobby's 15.1. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Perimeter | Greybobby |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/perimeter-middle-school/id1251050533/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | — |
| Size | 48 MB | 50 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Perimeter Church, Inc.](https://appshunter.io/developer/1028677913) | [Greybobby Ministries Inc](https://appshunter.io/developer/1794185460) |

## What reviewers say

### Perimeter

[App page](https://appshunter.io/ios/app/perimeter-middle-school/id1251050533)

This app supports middle school discipleship groups by providing access to curriculum, scripture readings, and note-taking features. It is designed for use by participants of Perimeter Church's middle school program.

**Highlights:** View curriculum, Read scripture, Take notes, Mobile access, Discipleship group support

**In-app purchases:** none


### Greybobby

[App page](https://appshunter.io/ios/app/greybobby/id6446960949)

**In-app purchases:** none


## Frequently asked questions

### Is Perimeter free?

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

### Is Greybobby free?

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

### Do Perimeter or Greybobby have ads?

Neither Perimeter nor Greybobby shows ads.

### Which is updated more often, Perimeter or Greybobby?

Perimeter ships an update every 2 months, and Greybobby every 2 months. Most recently, Perimeter was updated on October 6, 2026 and Greybobby on October 13, 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.*