Comparison

Interval Timer vs PROSPR

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

Head to head
About

Interval Timer

This app is a versatile interval timer designed for various training styles like Tabata and HIIT. It offers customizable workout parameters, voice guidance, and music ducking for an enhanced training experience. Save your custom workouts and track your progress.

Highlights
  • Customizable interval settings
  • Voice assistant with text-to-speech
  • Music ducking for audio integration
  • Save custom workouts
  • Tabata, Rounds, Stopwatch modes
  • Apple Health integration
Features
Read full description

Special timer for interval training. This Interval Timer offers: • Very intuitive interface. After installing this timer you need to press one button to start a tabata workout with classic settings. • Ability to set up prepare, work, rest, rest between sets, cool down time, number of cycles and sets. • Intervals can be configured individually. With this interval training timer you can create any interval workout with any sequence of intervals. • Voice assistant with text-to-speech. • Add descriptions to intervals that will be displayed on the timer screen and will be voiced. • Bright and nice colors. • Ability to lower the volume in your music player while playing the timer sounds (ducking). • List of your saved workouts. • NEW! Quick workout - setup your workout with fast and ease. The opportunity to display mode: - Tabata Protocol. - Rounds. - Stopwatch. - Intervals. Tabata is a form of high-intensity interval training (HIIT): • Workout hard for 20 seconds • Rest for 10 seconds • Complete 8 rounds It's time to train, good luck! Application supports Apple Health to track activity during workout. You can download the app for free. Further use requires a subscription. At our discretion, we may decide to offer you a free trial per the terms displayed in the app. Please note that: When opting for a subscription, you pay the fixed price for your country, which is displayed in the app. Payment will be charged to your Apple ID Account upon confirmation of purchase. Subscription automatically renews and free trial automatically converts into subscription unless auto-renewal is turned off at least 24 hours before the end of the current period. Your Account will be charged for renewal within 24 hours prior to the end of the current subscription period. You can manage your subscriptions and turn off auto-renewal by going to Account Settings after purchase. When canceling a subscription or a free trial, your subscription/free trial will stay active until the end of the current period. Auto-renewal will be disabled, but the current subscription will not be refunded. Terms of Use and Privacy Policy: https://docs.google.com/document/d/1FMzBsd_mSO69xuzkpOKljPPtxRMWMTzt2iGs6wJIhik

About

PROSPR

Features
Read full description

Burnout doesn't arrive overnight. It builds in your sleep, shows up through your heart rate, or your recovery weeks before you feel it. PROSPR reads the signals your body is already sending, so you can act early. You're good at pushing through. Long days. Short nights. One more thing before you stop. By the time exhaustion registers, you're already deep in it and recovery takes far longer than prevention ever would. The signs were there. You just couldn't see them. What you get + Early-warning detection: Your health data, read for the signals that precede burnout, not just today's numbers. + Ten-second check-ins: A quick daily pulse on how you feel, blended with what your body reports. + Built for Apple Watch: Glance, log, and stay aware from your wrist. No phone required. + Apple Health insights: Heart rate, HRV, sleep, and activity, turned into something you can act on. + Trends over time: See how stress and recovery move across weeks, so patterns become obvious. + Privacy by design: Your health data stays yours. Read on your terms, never sold. + Who it's for: Busy Professionals, parents, first responders, or anyone running hot who'd rather catch the warning light than live through the breakdown. Be PROSPR === Subscription Explanation: To unlock unlimited use of PROSPR, a subscription is required. We offer a free trial to experience the full benefits and features. After the trial period ends, subscriptions are required. Subscription are available on a monthly or yearly basis. The exact cost may vary depending on your location and local currency. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. === Disclaimer: PROSPR will not diagnose, treat, or prescribe medication. PROSPR is not a replacement for licensed medical supervision. Please consult a licensed medical professional for any diagnosis, treatment or medical support. === For more information on General Terms of Use and Privacy Policy: Privacy Policy: https://privacy.beprospr.app/ Terms of Use: https://terms.beprospr.app/

Screenshots

Interval Timer4 screens
PROSPR4 screens

Verdict

The call

The clearest difference is iOS requirement: Interval Timer at 16.0 against PROSPR's 18.6. On price, update cadence, ads and in-app purchases 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. Interval Timer sells 12 in-app purchases, starting at $1.99 per month and PROSPR sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval Timer ships an update every 4 weeks, PROSPR every 2 weeks. The most recent releases landed on October 14, 2026 and October 1, 2026 respectively.

Scorecard1 real difference · 9 level
Interval Timer versus PROSPR: the parameters behind the verdict, then further details
ParameterInterval TimerPROSPR
PriceFreeFree
Rating4.7 (3.5K ratings) — better—
Positive reviews66.5% of reviews—
Number of ratings3.5K — better—
Update frequencyEvery 4 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscription—
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS16.0 — better18.6
Further details — not scored
Size243 MB21 MB
Age rating4+12+
DeveloperHIIT Apps Sp. z o.o.INFN8

Bugs and requests

Interval Timer

Reported bugs

3 issues
  • Workouts disappearing
  • App crashes and freezes
  • Timing issues with intervals

Requested features

4 requests
  • Apple Watch integration
  • More customization options
  • Additional audio cues and prompts
  • Improved workout tracking and history

PROSPR

Not enough reviews yet to summarise bugs or requests.

In-app purchases

12 purchases

Interval Timer

Subscriptions8
  • Intervals: monthly membership7 Days trial$1.991 Month
  • Intervals: membership7 Days trial$3.993 Months
  • Intervals: monthly membership$4.991 Month
Show 5 more
  • Intervals: yearly membership$6.991 Year
  • Intervals: yearly membership1 Year trial$9.991 Year
  • Intervals: yearly membership7 Days trial$19.991 Year
  • Intervals: yearly membership7 Days trial$24.991 Year
  • Intervals: membership7 Days trial$24.991 Year
One-time4
  • Intervals | PRO version$14.99
  • Intervals | Membership$14.99
  • Intervals | Membership$34.99
Show 1 more
  • Intervals | Membership$39.99
3 purchases

PROSPR

Subscriptions3
  • PROSPR Monthly Subscription7 Days trial$6.991 Month
  • PROSPR 1 Year Promo7 Days trial$9.991 Year
  • PROSPR Yearly Subscription7 Days trial$44.991 Year

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is PROSPR free?
PROSPR is free to download, with in-app purchases available.
Do Interval Timer or PROSPR have ads?
Neither Interval Timer nor PROSPR shows ads.
Which is updated more often, Interval Timer or PROSPR?
Interval Timer ships an update every 4 weeks, and PROSPR every 2 weeks. Most recently, Interval Timer was updated on October 14, 2026 and PROSPR on October 1, 2026.

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