---
title: "Jam Timer - Roller Derby Timer — App Overview"
url: https://marlvel.ai/intel-report/sports/app-dly-jamtimer
category: Sports
developer: DLY
platforms: ios
rating: 1.0 (1 ratings)
pricing: paid
report_level: overview
generated: 2026-04-30
---

<!-- SECTION: Key Insight -->
> **Key Insight:** This is a dedicated, offline-capable utility built specifically to streamline the technical requirements of roller derby officiating.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Sports |
| Rating | 1.0 ★ (1) |
| Pricing | paid |
| Platforms | iOS |
| Latest Version (iOS) | 1.0.0 |
| Developer | DLY |

<!-- SECTION: Summary -->
## What is Jam Timer - Roller Derby Timer?

RollTimer is a specialized officiating tool designed to replace traditional stopwatches for roller derby jam timers. It supports multiple rule sets, including WFTDA, RDCL, and OSDA, while providing professional-grade timing controls for bouts and scrimmages.

<!-- SECTION: Key Features -->
## Key Features

- **Built-in Game Configurations**: Includes pre-set timing rules for WFTDA, RDCL, and OSDA formats, plus custom options for scrimmages.
- **Professional Timing Control**: Manages jam timing, period clocks, lineup tracking, and team timeouts with haptic vibration warnings.
- **Officiating-Focused Interface**: Features large, high-contrast buttons for one-handed operation and visibility across the track.
- **Offline Functionality**: Operates entirely without an internet connection to ensure reliability during live events.

<!-- SECTION: Target Audience -->
## Who is it for?

Roller derby officials and bout organizers.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/jam-timer-roller-derby-timer/id6747149650?uo=2)
- [Full Intelligence Report](https://marlvel.ai/intel-report/sports/app-dly-jamtimer)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/intel-report/sports/app-dly-jamtimer).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*