# Jim's Holy Roller — Dice roller for tabletop RPGs

> Dice roller for tabletop RPGs (iPhone/iPad app by RHYME MASTER J TOASTERFACE.)

- Source: https://appshunter.io/ios/app/jims-holy-roller/id6800616397 (this page in markdown: same URL + `.md`)
- Developer: [RHYME MASTER J TOASTERFACE](https://appshunter.io/developer/6796034488)
- Category: Games, Utilities, Role Playing, Simulation
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 13 MB
- Languages: American English
- Released: 2026-08-14
- Data updated: 2026-08-16
- User reviews in markdown: https://appshunter.io/ios/app/jims-holy-roller/id6800616397/reviews.md

## What is Jim's Holy Roller?

Jim's Holy Roller is a fast, no-nonsense dice roller for tabletop RPGs — and a probability calculator hiding inside a dice app.

Type a dice expression, tap Roll, and get your result. Want to know how likely that result actually is? Tap Simulate to roll the same expression thousands of times and watch the outcomes fill in a live histogram, complete with percentages and the top 5 most common totals.

SUPPORTED DICE NOTATION
• Standard rolls — 1d20, 2d6, 3d8, 1d100
• Modifiers — 2d6+3, 1d20-1
• Keep and drop — 4d6dl1 (drop lowest), 2d20kh1 (keep highest), plus dh/kl
• Exploding dice — 3d6! (max rolls roll again)
• Advantage and disadvantage — type "adv" or "dis" for D&D-style d20 rolls

SEE THE PROBABILITIES
Rolling once tells you what you got. Simulating tells you what to expect. Run hundreds or thousands of trials and see the full distribution as a bar chart — perfect for comparing builds, weighing a risky attack, or just settling an argument about whether 4d6 drop lowest is really that generous.

Whether you're rolling for damage or geeking out over the math behind your dice, Jim's Holy Roller gives you both the roll and the reason.

Privacy: No account, no ads, no tracking. Jim's Holy Roller uses anonymous analytics only to understand general usage and improve the app — it never sells your data or tracks you across other apps.


## Version history (last 2 releases)

### 1.3 — 2026-08-15

Couple of small bug fixes
New features:
* Validation on dice entries
* Show dice on single roll
* Press enter to roll - quality of life improvements

### 1.0 — 2026-08-14

No release notes.

## More apps by RHYME MASTER J TOASTERFACE

- [Fun Ku](https://appshunter.io/ios/app/fun-ku/id6796034486)

All apps by RHYME MASTER J TOASTERFACE: https://appshunter.io/developer/6796034488

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-16.*