Comparison

Roll Time vs SYSTEM JJ

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Roll Time

This app is a professional round timer designed for coaches in combat sports like BJJ, MMA, and boxing. It features a large, high-contrast display, customizable sound alerts, and the ability to mirror the timer to a TV for a wall-timer experience. Coaches can save unlimited presets for different training formats and even display their gym's logo.

Highlights
  • Customizable work, warning, and rest intervals
  • Optional prepare and cooldown phases
  • Unlimited saved presets for classes and drills
  • Loud sound and voice alerts
  • Smart Volume for music adjustment
  • High-contrast, large timer display
  • TV mirroring for wall-timer setup
  • Gym logo display
Features
Read full description

Roll Time is a professional gym round timer and TV display built for coaches running real classes — not just a workout timer. Designed for Brazilian Jiu-Jitsu, MMA, boxing, and other combat sports, Roll Time helps you run rounds, drills, sparring, in-house matches, and full class blocks with a big, high-contrast display your entire room can see. Connect Roll Time to your gym TV for a dedicated big-screen experience. While no timer is running, Gym Display turns the screen into a branded hub for announcements, seminars, open mats, promotions, schedules, and more. When it’s time to train, the timer takes over automatically. Create custom Gym Display cards with your own images, colors, text, and highlights. Schedule when they appear, rotate through multiple cards, and feature important announcements full-screen. Show your gym logo on the timer, run in-house tournaments with competition-style match presets, and start classes quickly with saved timers. Built for combat sports: • BJJ academies, MMA and boxing gyms, wrestling rooms, and martial arts dojos • Sparring rounds, positional rounds, competition matches with score tracking, HIIT intervals, open mats, and solo training Key features: • Flexible round timing with Work, Warning, Rest, Prepare, and Cooldown phases • Saved timers for classes, sparring rounds, drills, and matches • Competition-style match timers with score tracking • Gym Display for announcements, seminars, promotions, schedules, and more • Custom display cards with your own images, colors, text, and scheduling • Dedicated TV experience for the timer and Gym Display • Loud sound and voice alerts built for noisy gyms • Custom sounds and announcements — record your own timer alerts • Smart Volume lowers music while you coach, then brings it back during rolls • Big, high-contrast timer display visible across the mats • Simple touch controls — start, pause, reset, and adjust rounds quickly • Gym logo display — showcase your academy brand on the timer and TV • iCloud Backup — restore your timers later or move them to another device • Built for class. Free from unnecessary distractions.

About

SYSTEM JJ

This training companion helps you master jiu-jitsu by capturing session intentions and feedback. Record audio and video notes, utilize templates, and get AI coaching within the app.

Highlights
  • Capture training session intentions
  • Record audio notes
  • Record video notes
  • Utilize templates
  • AI coach integration
Features
Read full description

SYSTEM Jiu-Jitsu notes is your training companion for mastering jiu-jitsu. Capture all of your training session intentions and feedback including audio notes, video notes, templates, and Ai coach right within the application.

Screenshots

Roll Time4 screens
SYSTEM JJ3 screens

Verdict

The call

The clearest difference is in-app purchases: SYSTEM JJ at none against Roll Time's 1. SYSTEM JJ also leads on update cadence (every 3 days vs weekly) and iOS requirement (15.1 vs 18.0). Roll Time's advantage is ratings volume (28 vs 2). On price, rating, ads and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Roll Time sells 1 one-off in-app purchase. SYSTEM JJ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Roll Time against 5.0 for SYSTEM JJ. That said, the two scores are not equally well evidenced: Roll Time has 28 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

Roll Time ships an update weekly, SYSTEM JJ every 3 days. The most recent releases landed on October 8, 2026 and October 19, 2026 respectively.

Scorecard4 real differences · 6 level
Roll Time versus SYSTEM JJ: the parameters behind the verdict, then further details
ParameterRoll TimeSYSTEM JJ
PriceFreeFree
Rating5.0 (28 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings28 — better2
Update frequencyWeeklyEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.015.1 — better
Further details — not scored
Size44 MB194 MB
Age rating4+4+
DeveloperAlexander TsapaevNicholas Hession-Kugelman

In-app purchases

1 purchases

Roll Time

One-time1
  • PRO Edition$9.99
None

SYSTEM JJ

No in-app purchases

Questions

Is Roll Time free?
Roll Time is free to download, with in-app purchases available.
Is SYSTEM JJ free?
SYSTEM JJ is free to download, with no in-app purchases.
Which has better reviews, Roll Time or SYSTEM JJ?
Roll Time and SYSTEM JJ are both rated 5.0 out of 5 on the App Store, from 28 and 2 ratings respectively.
Do Roll Time or SYSTEM JJ have ads?
Neither Roll Time nor SYSTEM JJ shows ads.
Which is updated more often, Roll Time or SYSTEM JJ?
Roll Time ships an update weekly, and SYSTEM JJ every 3 days. Most recently, Roll Time was updated on October 8, 2026 and SYSTEM JJ on October 19, 2026.

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