Comparison

Simple Interval Timer vs RUN interval

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

Head to head
About

Simple Interval Timer

This app provides a customizable interval timer for various training methods like HIIT, Tabata, and boxing. Structure your workouts to achieve your fitness goals with configurable sets and timers.

Highlights
  • Customizable interval sets
  • Configurable workout values
  • Supports HIIT, Tabata, boxing, sprints
  • Workout structure and discipline
  • Achieve fitness goals
Features
Read full description

The Simple Interval Timer - S.I.T. is designed for any kind of interval training. Create your own sets and workouts! All the values are configurable so it can be used in different interval training methods such as Crossfit Training, HIIT, Tabata, boxing, or sprint training. It will give your workout the discipline and structure necessary to try and accomplish your fitness goals.

About

RUN interval

This app simplifies interval and Fartlek running by allowing you to set custom targets for time or distance during hard, easy, and rest efforts. It offers detailed post-run summaries, audio and visual feedback, and an Apple Watch app for enhanced training.

Highlights
  • Customizable interval sessions
  • Time and distance targets
  • Distance Goal option
  • Audio and visual feedback
  • Detailed run summaries
  • Apple Watch app
  • Strava sharing
Features
Read full description

Easily set up and record your Interval and Fartlek running sessions. With the flexibility of using time and/or distance as interval targets for your "Hard", "Easy" and "Rest" efforts. The simple but highly configurable interface on your phone and watch will have you running sooner. Now with a Distance Goal option for your session. Along with great audio and visual feedback, detailed post-run summary, share your runs to Strava, and a full-featured Apple Watch app. You can also record your regular runs with voice-over calling out distance and pace feedback. Key Features: • Easily create flexible custom interval sessions. • Utilize three effort targets "Hard", "Easy" and "Rest" in each set, targeting time or distance (meters or miles). • You can "Skip" any of the three efforts to create flexible sets, like building a progressive intervals session. • NEW: Set a Distance Goal for your session, that repeats the sets from the start until the distance has been reached. • Set a Warm-Up and Warm-Down timer or distance around your session. • Clear and easily glanceable visuals and audio prompts, including vibrations. • Voice-over prompts to save you from looking at the screen, great for iPhone or headphone users. • Voice-over prompts include the upcoming intervals effort and time/distance amount, and your last intervals average pace and heart rate. • Full-featured Apple Watch App! • Heart Rate Zones! (see description below) • Indoor Mode, no GPS, for treadmill running. • Sound Mode, for normal, discrete or silent audio prompts on your watch. • Vibration feedback on both the phone and watch. • Detailed run summary, showing pace for hard and easy efforts. • The run summary also includes interval breakdown, distance breakdown and heart rate details. • Play music or podcasts while running and still hear the audio prompts. • Sharing. Share a summary photo with your friends. • Private data. We don’t send any of your data to a server or share it with anyone. Session Types: • Normal Run – Record a normal run, long or short. • Record Intervals – If you run with a group or do an undefined session, then use the Record Interval option. It allows you to manually change between "Hard" and "Easy" reps, allowing you to record your session. • Custom Intervals – Our fully flexible intervals that allow you to use time and/or distance for the efforts. Add multiple intervals sets together to create the session you want. Sharing: From the summary screen, you can share your runs with friends or across social media. If you want to share directly with friends or across other social media, you can share a summary image with the details of your run. Heart Rate Zones: (Apple Watch Only) Zones are displayed as grouped percentages of your maximum heart rate. Giving you an indication of your current work rate based on your current heart rate. Just enter your maximum workout heart rate into our Settings screen and they will display on your Watch the next time you run. Zone 1: Very Light Effort 50-60% (Gray) Zone 2: Light Effort 60-70% (Blue) Zone 3: Moderate Effort 70-80% (Green) Zone 4: Hard Effort 80-90% (Yellow) Zone 5: Maximum Effort 90-100% (Red) Privacy: We don’t want to know where you have run, that's for you to worry about. We don’t send any of your data to a server or share it with anyone you don't want too. We keep your running records safe in Apple Health so you have control. Apple Heath gives you the control over who accesses your data. We only write and read the data we record from your running. Feedback: And because we don't send any data to a server, we need you to send us feedback and suggestions. Hit the Support link below or visit our website to contact us.

Screenshots

Simple Interval Timer3 screens
RUN interval4 screens

Verdict

The call

The clearest difference is rating: RUN interval at 4.7 against Simple Interval Timer's 4.0. RUN interval also leads on review sentiment (77% vs 50%) and ratings volume (1K vs 2). Simple Interval Timer's advantage is in-app purchases (none vs 2) and update cadence (every 5 days vs every 3 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. RUN interval sells 2 one-off in-app purchases. Simple Interval Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

RUN interval holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: RUN interval has 1K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Simple Interval Timer's written reviews are positive against 77% of RUN interval's.

UpkeepUpdate frequency

Simple Interval Timer ships an update every 5 days, RUN interval every 3 months. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

Scorecard7 real differences · 3 level
Simple Interval Timer versus RUN interval: the parameters behind the verdict, then further details
ParameterSimple Interval TimerRUN interval
PriceFreeFree
Rating4.0 (2 ratings)4.7 (1K ratings) — better
Positive reviews50.0% of reviews77.5% of reviews — better
Number of ratings21K — better
Update frequencyEvery 5 days — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPod, Apple Watch
Requires iOS13.5 — better15.6
Further details — not scored
Size2 MB34 MB
Age rating4+4+
DeveloperDES ProductionsCAN YOU HEAR ME SOFTWARE

Customer experience

Simple Interval Timer

All ratings2 ratings
Positive50.0%
Neutral50.0%
Negative0.0%
Written reviews4 reviews
Positive50.0%
Neutral25.0%
Negative25.0%

RUN interval

All ratings1,003 ratings
Positive94.3%
Neutral1.6%
Negative4.1%
Written reviews191 reviews
Positive77.5%
Neutral5.2%
Negative17.3%

In-app purchases

None

Simple Interval Timer

No in-app purchases

2 purchases

RUN interval

One-time2
  • The full RUN interval$1.99
  • The full RUN interval$3.99

Questions

Is Simple Interval Timer free?
Simple Interval Timer is free to download, with no in-app purchases.
Is RUN interval free?
RUN interval is free to download, with in-app purchases available.
Which has better reviews, Simple Interval Timer or RUN interval?
RUN interval is rated higher. Simple Interval Timer averages 4.0 out of 5 from 2 ratings, while RUN interval averages 4.7 from 1K ratings.
Do Simple Interval Timer or RUN interval have ads?
Neither Simple Interval Timer nor RUN interval shows ads.
Which is updated more often, Simple Interval Timer or RUN interval?
Simple Interval Timer ships an update every 5 days, and RUN interval every 3 months. Most recently, Simple Interval Timer was updated on October 1, 2026 and RUN interval on October 12, 2026.

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