Comparison

Precision Interval Timer vs Rollbook

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

Head to head
About

Precision Interval Timer

Create custom workout routines with pre-programmed warm-ups, intervals, conditioning, and cool-downs. Set work and rest periods, repeat cycles, and let the timer guide your training session.

Highlights
  • Pre-program entire workouts
  • Customizable work and rest intervals
  • Repeat cycles for exercises
  • Warm-up, conditioning, and cool-down sections
  • Guided training sessions
  • Stackable interval sections
Features
Read full description

With this interval timer you can pre-program your entire workout without having to stop and reset the intervals for your next exercise. Pre-program your warm-up, your intervals, your conditioning, and cool-down. Start the clock and let the timer guide you based on your inputs. The example below will illustrate what you can program in a full workout. Warm-up - 5 mins work, 0 mins rest, repeat 1 (in green bar repeat only 1, default setting) Add a section: (This will add a green bar, then program the intervals below in yellow) Skip rope intervals - 30 secs work, 30 secs rest, repeat 10 Rest between exercises - 0 mins work, 2 mins rest, repeat 1 Mountain Climber Intervals - 20 secs work, 10 secs rest, repeat 8 Rest between exercises - 0 mins work, 2 mins Let's say you wanted to repeat this entire cycle 3 times, you would then input 3 in the green bar above. You will cycle through this stack of intervals 3 times before moving on to your next activity. Add a section: Shadowboxing - 3 mins work, 1 min rest, repeat 4 Rest between to put on hand wraps - 0 mins work, 6 mins rest, repeat 1 Heavy bag - 3 mins work, 1 min rest, repeat 6 Rest before next activity - 0 mins work, 3 mins rest, repeat 1 Tabata Punchouts - 20 secs work, 10 secs rest, repeat 8 Let's say for example that you wanted to repeat the above section twice, you could in put 2 in the green bar and you will go through the whole process twice. This would be advantageous if you wanted to do perform a circuit and move from one type of exercise to the next. You could cycle through as many times as you want. Add a Section: Cool down - work 5 mins, rest 0, repeat 1 At the very bottom is the option to repeat the entire cycle. If you wanted to set-up an entire workout that you cycle through twice you could input 2 at the very bottom.

About

Rollbook

Features
Read full description

The simplest way to track your BJJ journey: from white belt to black. Rollbook is the training companion serious grapplers have been waiting for. Log sessions in seconds, build your technique journal, and track every gym you've trained at worldwide. ▸ QUICK SESSION LOGGING No more forgotten training days. Log your rolls with one tap—record duration, training type (gi or no-gi), intensity, and key takeaways. Your entire training history, searchable and organized. ▸ TECHNIQUE JOURNAL That sweep your professor showed? The detail that finally made your armbar click? Capture techniques with notes, tags, and position categories. Never lose another insight from the mat. ▸ GYM PASSPORT Training while traveling? Visiting open mats? Track every academy you've trained at worldwide. Build your grappling passport and see your BJJ journey mapped across the globe. ▸ BELT PROGRESSION TIMELINE Document every stripe and promotion. See your progression visualized—from your first class to your next belt. Set goals and track the hours that matter. ▸ TRAINING STATS & INSIGHTS Weekly, monthly, and yearly breakdowns. Training frequency, favorite gyms, most-practiced techniques. Data that helps you train smarter. Whether you're a fresh white belt or a seasoned competitor, Rollbook keeps your entire jiu jitsu journey in one place—clean, fast, and reliable. Download free and start logging your first session today. Terms of Service: https://rollbook.app/terms/ Privacy Policy: https://rollbook.app/privacy/

Screenshots

Precision Interval Timer3 screens
Rollbook4 screens

Verdict

The call

The clearest difference is in-app purchases: Precision Interval Timer at none against Rollbook's 3. Precision Interval Timer also leads on iOS requirement (9.0 vs 15.0). Rollbook's advantage is update cadence (every 10 days vs every 4 months). On price, ads and device support 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. Rollbook sells 3 in-app purchases, starting at $1.99 per month. Precision Interval Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Precision Interval Timer ships an update every 4 months, Rollbook every 10 days. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Precision Interval Timer versus Rollbook: the parameters behind the verdict, then further details
ParameterPrecision Interval TimerRollbook
PriceFreeFree
Rating3.0 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 4 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size2 MB131 MB
Age rating4+4+
DeveloperJason Van VeldhuysenPhilipp Butzmann

In-app purchases

None

Precision Interval Timer

No in-app purchases

3 purchases

Rollbook

Subscriptions2
  • RollBook Monthly7 Days trial$1.991 Month
  • Rollbook Supporter7 Days trial$14.991 Year
One-time1
  • Rollbook Supporter Lifetime$49.99

Questions

Is Precision Interval Timer free?
Precision Interval Timer is free to download, with no in-app purchases.
Is Rollbook free?
Rollbook is free to download, with in-app purchases available.
Do Precision Interval Timer or Rollbook have ads?
Neither Precision Interval Timer nor Rollbook shows ads.
Which is updated more often, Precision Interval Timer or Rollbook?
Precision Interval Timer ships an update every 4 months, and Rollbook every 10 days. Most recently, Precision Interval Timer was updated on October 24, 2026 and Rollbook on October 31, 2026.

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