# Roll 20! vs GM Library

The clearest difference is price: Roll 20! at $0.99 against GM Library's $1.99. On ads, in-app purchases, chart position and device support there is nothing between them.

Roll 20! costs $0.99 and GM Library $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Roll 20! | GM Library |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[3.7 (42 ratings)](https://appshunter.io/ios/app/roll-20/id1490773813/reviews)** | — |
| Number of ratings | **42** | — |
| Positive reviews | 63.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Monetization | Paid | — |
| Best chart rank | **#146** | #191 |
| Size | 2 MB | 8 MB |
| Requires iOS | **17.0** | 18.2 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ziga Porenta](https://appshunter.io/developer/668433991) | [EduServe, Inc.](https://appshunter.io/developer/441447295) |

## What reviewers say

### Roll 20!

[App page](https://appshunter.io/ios/app/roll-20/id1490773813)

**Currently charting:** #146 Top Paid · Board (US App Store)

This app provides a convenient dice rolling experience directly on your Apple Watch. It supports various dice types, multiple rolls, and special mechanics like advantage/disadvantage, all without needing your phone.

**Highlights:** Supports d4, d6, d8, d10, d12, d20, d100, Roll multiple dice simultaneously, Advantage and disadvantage mechanics, Customizable dice colors, Dice rolling via tap, shake, Siri, or Shortcuts, Always-On display and VoiceOver support

**Features:** Apple Watch app

**In-app purchases:** none


### GM Library

[App page](https://appshunter.io/ios/app/gm-library/id6744944364)

**Currently charting:** #191 Top Paid · Role Playing (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Roll 20! free?

Roll 20! costs $0.99, with no in-app purchases.

### Is GM Library free?

GM Library costs $1.99, with no in-app purchases.

### Do Roll 20! or GM Library have ads?

Neither Roll 20! nor GM Library shows ads.

### Which is more popular, Roll 20! or GM Library?

Roll 20! currently peaks at #146 in the App Store charts, and GM Library at #191. Chart position reflects recent download velocity rather than total install base.

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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.*