Comparison

Interval Timer for HIIT | Cero vs Neuro Physio Rx.

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

Head to head
About

Interval Timer for HIIT | Cero

Create custom interval workouts for HIIT, Tabata, and circuit training. Features adaptive heart rate training, Siri integration, and Apple Watch support. Track progress and share your custom routines.

Highlights
  • Customizable interval programming
  • Adaptive heart rate training
  • Siri and Shortcuts integration
  • Apple Watch app
  • Workout history and sharing
  • Live Activities and Dynamic Island support
Features
Read full description

Build an interval workout around the way you train. Cero is a flexible interval timer for HIIT, Tabata, circuit training, WODs and HYROX preparation. Set up a quick work/rest timer or program each interval in detail. Distinct colors, large controls and reliable cues keep you focused on the session instead of the clock. BUILD YOUR SESSION • Set work, recovery, sets, warm-up and cool-down. • Create advanced workouts with custom intervals, colors, icons and intensity levels. • Save, duplicate and reorder timers. • Share timers by file or QR code. • Review completed sessions in workout history. STAY IN THE WORKOUT • Follow compatible sessions with Live Activities and Dynamic Island. • Start saved or recent timers from Home Screen widgets. • Use Siri and Shortcuts to start, pause, resume and stop a timer. • Put Gym Display on a larger screen or mirrored TV. • Choose a default song or assign music to individual intervals. • Customize sounds, voice cues, vibrations and background alerts. TRAIN BY HEART RATE Adaptive HR can extend recovery until you reach your target heart rate, then guide hard efforts with low and high alerts. Pair a Bluetooth heart-rate monitor with iPhone or train with heart-rate data from Apple Watch. COUNTDOWN AND STOPWATCH The built-in countdown and lap stopwatch cover warm-ups, station changes, rest periods and race-day practice. Stopwatch sessions continue after you close and reopen the app. ON APPLE WATCH Run saved workouts from your wrist, follow heart rate and use the standalone countdown and stopwatch. Cero can save completed workouts and estimated calories to Apple Health. Automatic iCloud backups help protect saved timers and custom intervals. Useful for HIIT, Tabata, circuits, EMOM-style workouts, boxing rounds, strength and conditioning, indoor cycling, running intervals and hybrid race preparation. Feedback and suggestions: hi@flawless.studio Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Neuro Physio Rx.

Features
Read full description

Introducing Neuro Physio Rx, the app designed to help you manage and alleviate pain effectively! With personalized features and expert guidance, Neuro Physio Rx is your ultimate pain Relief app for managing discomfort, improving well-being, and achieving a healthier, pain-free life. Explore tailored tools, guided therapy and comprehensive tracking to find relief from all types of pain. Key Features of Neuro Physio Rx. 1. Personalized Pain Relief Management Plans Neuro Physio Rx provides tailored pain management plans based on your unique needs. Whether you’re dealing with acute or chronic pain or occasional discomfort, our app offers structured, expert-developed routines for pain management that adapt to your needs. Say goodbye to generic pain solutions and experience relief that’s crafted just for you. 2. Targeted Exercises for Pain Relief Our app offer a multi-modal approach to pain relief. The Exercise Categories have been extensively researched to optimize pain relief holistically. The categories include but are not limited to Mobility, Neuromobility, Yoga, Meditation, Vision exercises, and Massage. Designed with both ease and effectiveness in mind, these exercises empower you to take control of your body’s health. 3. Comprehensive Pain Tracker Track your pain with Neuro Physio Rx’s pain tracker, a feature that lets you log symptoms and progress over time. Your progress, both pain level and functional levels, are plotted on graphs which allow you to see the progress you’ve made from completing the recommended exercises. 4. Expert Advice and Education Neuro Physio Rx includes a rich library of resources created by health experts, providing you with valuable insights into pain relief, pain prevention techniques, and holistic approaches to improving wellbeing. The Neuro Physio App provides clinically proven and effective techniques that allow you to better manage your pain. 5. Start Your Journey to Pain-Free Living Download Neuro Physio Rx today to begin your path to effective pain relief. From personalized pain relief management plans to a supportive community, Neuro Physio Rx offers everything you need to alleviate pain and enhance your life. Embrace a healthier future with Neuro Physio Rx – your trusted companion in managing, tracking, treating and preventing pain.

Screenshots

Interval Timer for HIIT | Cero4 screens
Neuro Physio Rx.4 screens

Verdict

The call

The clearest difference is price: Interval Timer for HIIT | Cero at Free against Neuro Physio Rx.'s $3.99. Interval Timer for HIIT | Cero also leads on update cadence (every 3 days vs every 2 weeks). Neuro Physio Rx.'s advantage is iOS requirement (15.0 vs 18.0). On ads, in-app purchases 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

Interval Timer for HIIT | Cero is free to download; Neuro Physio Rx. costs $3.99 up front. Interval Timer for HIIT | Cero sells 2 in-app purchases, starting at $2.99 per month and Neuro Physio Rx. 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 for HIIT | Cero ships an update every 3 days, Neuro Physio Rx. every 2 weeks. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Timer for HIIT | Cero versus Neuro Physio Rx.: the parameters behind the verdict, then further details
ParameterInterval Timer for HIIT | CeroNeuro Physio Rx.
PriceFree — better$3.99
Rating4.7 (438 ratings) — better—
Positive reviews74.6% of reviews—
Number of ratings438 — better—
Update frequencyEvery 3 days — betterEvery 2 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.015.0 — better
Further details — not scored
Size50 MB32 MB
Age rating4+12+
DeveloperFlawless Studio LLCMandal Therapeutics Inc.

Bugs and requests

Interval Timer for HIIT | Cero

Reported bugs

4 issues
  • App runs in background draining battery
  • Rotation broke after update
  • Apple workout app overrides Cero app on Apple Watch
  • Interval signals too weak or not working

Requested features

5 requests
  • Ability to group timers
  • Option to add warm-up and cool-down features
  • Ability to type numbers for time adjustment
  • Timer sounds through headphones or interrupting music
  • Ability to change exercise names

Neuro Physio Rx.

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Interval Timer for HIIT | Cero

Subscriptions1
  • Cero Pro Monthly7 Days trial$2.991 Month
One-time1
  • Cero Pro$14.99
3 purchases

Neuro Physio Rx.

Subscriptions3
  • Monthly3 Days trial$6.991 Month
  • Semi Annual7 Days trial$34.996 Months
  • Annual$59.991 Year

Questions

Is Interval Timer for HIIT | Cero free?
Interval Timer for HIIT | Cero is free to download, with in-app purchases available.
Is Neuro Physio Rx. free?
Neuro Physio Rx. costs $3.99, and also offers in-app purchases.
Do Interval Timer for HIIT | Cero or Neuro Physio Rx. have ads?
Both Interval Timer for HIIT | Cero and Neuro Physio Rx. show ads.
Which is updated more often, Interval Timer for HIIT | Cero or Neuro Physio Rx.?
Interval Timer for HIIT | Cero ships an update every 3 days, and Neuro Physio Rx. every 2 weeks. Most recently, Interval Timer for HIIT | Cero was updated on November 6, 2026 and Neuro Physio Rx. on November 8, 2026.

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