Comparison

Simple Interval Workout Timer vs PeakO₂

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

Head to head
About

Simple Interval Workout Timer

This app provides a simple, intuitive timer for various interval training methods like Tabata, HIIT, and EMOM. It allows users to save unlimited custom workouts for free, making fitness routines more efficient and accessible.

Highlights
  • Interval training timer
  • Supports Tabata, HIIT, EMOM
  • Save unlimited workouts
  • Minimalistic UI
  • Readable from a distance
  • Ad-free experience
Features
Read full description

If you were searching for the timer app for your Tabata, hit, HIIT, emom, you name it - any interval or simply timed training, then that’s the one! Forever free and free from annoying ads. Simple, minimalistic, intuitive, polished, and smoothly animated user interface. Quick to set up and easily readable from a further distance. Make your interval workout a breeze with this app that allows you to save limitless workouts for free. Interval training is a great tool for burning a lot of calories in a short period of time and they help a lot with your cardiovascular health. Let’s get fit together!

About

PeakO₂

Enhance your breath control and oxygen efficiency with structured exercises. This app offers personalized training plans, guided sessions, and progress tracking for improved physical and mental endurance. Suitable for athletes, freedivers, and anyone looking to master their breath.

Highlights
  • Personalized O₂ training plans
  • Customizable breath-hold start time
  • Guided breath-hold sessions
  • Visual and audio cues
  • Progress tracking and milestones
  • Minimalist and intuitive design
Features
Read full description

Transform your breath control and optimize your oxygen efficiency with PeakO₂, the ultimate app for breath-hold and respiratory training. Designed for freedivers, athletes, meditators, and anyone seeking better physical and mental endurance, PeakO₂ helps you master oxygen efficiency through structured, customizable exercises. Key Features Personalized O₂ Training Plans • Customize your breath-hold start time • Increment hold durations as you progress • Set rest intervals and cooldown periods Guided Breath-Hold Sessions • Step-by-step visual and audio cues for a seamless experience • Clear progress animations for focus and consistency Track Your Progress • Monitor your longest breath-hold and total training time • Build streaks and stay motivated with performance milestones Beautiful, Intuitive Design • Minimalist interface to keep you focused during training • Calm visuals for a relaxing, distraction-free experience Perfect for All Levels Whether you’re a beginner building breath control, a swimmer, a freediver, or someone improving focus through breath work, O₂ Trainer adapts to your pace. Breathe smarter. Train better. Download PeakO₂ today and begin your journey to mastering your breath. Terms and pricing: The annual subscription fee is $99.99 USD, offering you unlimited access to exclusive features as long as your subscription is active. This subscription renews automatically, with the charge being applied to your iTunes account upon confirmation of your initial purchase. To avoid automatic renewal, you can disable the auto-renewal feature in your Account Settings at least 24 hours before the end of the current subscription period. For more information, please refer to our terms of service available at https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ or privacy policy on https://magnetic-cement-d48.notion.site/Privacy-Policy-for-PeakO-iOS-App-15f9cea87bdb80cc8b2de5df98cd8d3c

Screenshots

Simple Interval Workout Timer4 screens
PeakO₂4 screens

Verdict

The call

The clearest difference is in-app purchases: Simple Interval Workout Timer at none against PeakO₂'s 4. Simple Interval Workout Timer also leads on ads (none vs shown) and iOS requirement (9.0 vs 17.6). PeakO₂'s advantage is update cadence (monthly vs every 4 months) and rating (4.9 vs 4.7). On price, ratings volume 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. PeakO₂ sells 4 in-app purchases, starting at $0.99 per 7 days. Simple Interval Workout Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PeakO₂ holds the better App Store score, 4.9 against 4.7. Both are backed by a comparable volume of ratings — 7 and 13 respectively.

UpkeepUpdate frequency

Simple Interval Workout Timer ships an update every 4 months, PeakO₂ monthly. The most recent releases landed on September 25, 2026 and September 22, 2026 respectively.

Scorecard6 real differences · 4 level
Simple Interval Workout Timer versus PeakO₂: the parameters behind the verdict, then further details
ParameterSimple Interval Workout TimerPeakO₂
PriceFreeFree
Rating4.7 (7 ratings)4.9 (13 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings713 — better
Update frequencyEvery 4 monthsMonthly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS9.0 — better17.6
Further details — not scored
Size53 MB24 MB
Age rating4+4+
DeveloperArtur FijalOriginX

Customer experience

Simple Interval Workout Timer

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

PeakO₂

All ratings12 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Simple Interval Workout Timer

No in-app purchases

4 purchases

PeakO₂

Subscriptions3
  • Weekly$0.997 Days
  • Monthly$3.991 Month
  • Yearly3 Days trial$17.991 Year
One-time1
  • Lifetime$29.99

Questions

Is Simple Interval Workout Timer free?
Simple Interval Workout Timer is free to download, with no in-app purchases.
Is PeakO₂ free?
PeakO₂ is free to download, with in-app purchases available.
Which has better reviews, Simple Interval Workout Timer or PeakO₂?
PeakO₂ is rated higher. Simple Interval Workout Timer averages 4.7 out of 5 from 7 ratings, while PeakO₂ averages 4.9 from 13 ratings.
Do Simple Interval Workout Timer or PeakO₂ have ads?
PeakO₂ shows ads; Simple Interval Workout Timer does not.
Which is updated more often, Simple Interval Workout Timer or PeakO₂?
Simple Interval Workout Timer ships an update every 4 months, and PeakO₂ monthly. Most recently, Simple Interval Workout Timer was updated on September 25, 2026 and PeakO₂ on September 22, 2026.

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