Comparison

Simple Interval Timer vs Onform

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 straightforward interval timer for various training types like running, cycling, and HIIT. Customize sets, action, and break durations for a personalized workout experience. It runs in the background and saves recent configurations.

Highlights
  • Customizable sets, action, and break durations
  • Plain and simple design
  • Saves last 5 configurations
  • Runs in the background
  • iOS screen dimming prevention
  • Apple Watch integration with heart rate monitoring
Features
Read full description

Simple Interval Timer (SIT) can be used for any kind of interval training, such as running, cycling, HIIT sessions (including Tabata method), stretching, etc. SIT is exactly what you would expect. An interval timer, which is easy to set up and use. It features a nice plain design, with no unnecessary controls. Adjust Number of Sets, Action and Break duration to your needs and you are ready to go! On the iOS an extra switch control allows you to prevent the screen from dimming. SIT remembers the last 5 configurations you have used. Swipe left across the Settings screen to switch to another configuration. SIT can run in the background, while you are playing music, watching videos or doing anything else on your iOS device. SIT Watch features the same simplicity as the iOS app while offering the same functionality, plus it will measure your heartbeat during the workout sessions. The recordings will be available in the Apple's Health app. SIT Watch runs independently of the phone, so no need to have your phone around during your workouts (although you will need your phone during the very first time you launch SIT watch). SIT lets you avoid any tedious set up and focus on your training!

About

Onform

This app enables coaches to provide detailed video feedback and communicate effectively with athletes, both remotely and in person. It offers tools for analysis, markup, and direct messaging to streamline coaching and improve athlete performance.

Highlights
  • Video feedback with markup tools
  • Slow motion and comparison analysis
  • Voice-over and text messaging
  • 3D analysis for select sports
  • Organize athletes and teams
  • High-speed video recording
Features
Currently charting
Read full description

Onform is a mobile video coaching platform that helps coaches provide video feedback and communicate with athletes. With built-in individual and group communication tools, coaches can stay connected with remote and in-person athletes using voice-overs, messaging, and file/video sharing. Coach smarter, give athletes a better experience (athletes pay no fee to use the app with you), and get your time back. Expand your business with video coaching and manage more clients in less time. WHAT CAN YOU DO WITH ONFORM? COACH IN-PERSON AND REMOTE ATHLETES • Give in-person athletes instant visual feedback using slow motion, markup, and analysis tools they can review during or after a session. • Reach athletes wherever they are and generate new revenue through remote consultations and training. SHARE FEEDBACK • Use voice-over recording and markup tools to clearly highlight areas for improvement. • Use 3D golf analysis and skeleton tracking to visualize movement in new ways (requires iOS 18 or later). • Share video feedback privately or through broadcast messages so athletes can revisit your insights. CREATE ACCOUNTABILITY • Provide feedback without needing to be on a live call or in person. • Stay connected with athletes while traveling or between sessions. • Help athletes and teams stay accountable to the work required to improve. DRIVE EFFICIENCY • Organize teams and 1:1 interactions in one place. • Easily manage and communicate with hundreds of athletes. APP FEATURES • Compare two videos side by side or overlaid to analyze form and track improvement. • Record high-speed video from multiple angles at up to 240 FPS on supported devices, or capture video from external cameras. • Pause and resume recordings to capture multiple moments in a single video. • Auto-detect recordings for Golf, Baseball, and Softball, or use a Bluetooth camera trigger or the Onform Apple Watch app to control recording. • For golf, get 3D swing metrics and shot data from Garmin R10 and Full Swing KIT. • Use fine scrubbing, slow motion, and video markup tools for detailed analysis. • Record voice-overs and share them instantly. Instructor Cam lets you add video of yourself speaking for more personalized feedback. • Organize videos by athlete or team. Sort private and shared videos, and add titles and tags for easy search. • Automatically sync videos across your devices while Onform intelligently manages on-device storage. • Use 1:1 and group chat to exchange videos, share training information, and coordinate logistics. • Broadcast messages privately to athletes using Collections. • Save frequently used replies. • Use Pocket Radar and Stalker Radar as recording triggers. PRICING Simple pricing for athletes and coaches. Individuals can choose the Standard plan for $9.99/month or the fully featured Premium plan for $14.99/month. Coaches can choose from three tiers: • Coach Basic: $19.99/month • Coach Standard: $39.99/month • Coach Pro: $59.99/month, including unlimited clients Quarterly and yearly subscriptions are available at discounted rates. Payment will be charged to your Apple ID account at purchase confirmation. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://onform.com/terms-of-use/

Screenshots

Simple Interval Timer4 screens
Onform4 screens

Verdict

The call

The clearest difference is ads: Onform at none against Simple Interval Timer's shown. Onform also leads on update cadence (every 4 days vs every 8 months) and chart position (#89 vs unranked). Simple Interval Timer's advantage is review sentiment (85% vs 69%) and iOS requirement (14.5 vs 18.6). On price, rating, ratings volume 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. Simple Interval Timer sells 4 one-off in-app purchases and Onform sells 11 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for Simple Interval Timer against 4.8 for Onform. Both are backed by a comparable volume of ratings — 5.4K and 8.7K respectively. Written reviews are what separate them: 85% of Simple Interval Timer's written reviews are positive against 69% of Onform's.

UpkeepUpdate frequency

Simple Interval Timer ships an update every 8 months, Onform every 4 days. The most recent releases landed on October 12, 2026 and October 11, 2026 respectively.

Scorecard5 real differences · 6 level
Simple Interval Timer versus Onform: the parameters behind the verdict, then further details
ParameterSimple Interval TimerOnform
PriceFreeFree
Rating4.9 (5.4K ratings) — better4.8 (8.7K ratings)
Positive reviews84.7% of reviews — better69.1% of reviews
Number of ratings5.4K8.7K — better
Update frequencyEvery 8 monthsEvery 4 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#89 — better
DevicesiPhone, iPod, Apple WatchiPhone, iPad, Apple Watch
Requires iOS14.5 — better18.6
Further details — not scored
Size10 MB199 MB
Age rating4+4+
Developer0FFOnForm, Inc.

Customer experience

Simple Interval Timer

All ratings5,444 ratings
Positive97.6%
Neutral1.2%
Negative1.2%
Written reviews398 reviews
Positive84.7%
Neutral4.5%
Negative10.8%

Onform

All ratings8,669 ratings
Positive95.2%
Neutral1.6%
Negative3.2%
Written reviews285 reviews
Positive69.1%
Neutral6.3%
Negative24.6%

User reviews

Simple Interval Timer

From 5.4K App Store ratings

What we love

  • 👍 Simple and easy to use
  • 🚀 Efficient and straightforward
  • 💰 Actually free, no paywall
  • 🔊 Unobtrusive audio cues
  • 🎶 Works well with music playback

Room to improve

  • 🐛 Occasional bugs and crashes
  • ⚙️ Limited customization options
  • 🔋 Compatibility issues with newer iOS versions
  • 🔍 Difficulty deleting/managing saved configurations

Onform

From 8.7K App Store ratings

What we love

  • 🚀 Easy to use
  • 👍 Excellent communication tools
  • 👍 Helpful video analysis features
  • 👍 Intuitive and user-friendly
  • 👍 Streamlined workflow

Room to improve

  • 💰 Expensive subscription
  • 🐛 Auto-detect issues
  • 🐛 Crashes and stability problems
  • 🔋 High battery consumption
  • 📤 Limited free storage

Bugs and requests

Simple Interval Timer

Reported bugs

3 issues
  • Timer stops working when screen is locked
  • Countdown beeps not syncing with timer
  • Interval times not accurately tracked

Requested features

4 requests
  • Ability to name and delete saved configurations
  • More granular interval time settings (e.g., 1-second increments)
  • Stronger haptic feedback on Apple Watch
  • Integration with workout tracking apps

Onform

Reported bugs

3 issues
  • Chat feature not working
  • Inconsistent video recording
  • Syncing issues between devices

Requested features

5 requests
  • Ability to import multiple videos at once
  • More customization options
  • Improved video scrubbing and playback controls
  • Local video storage option
  • Expanded sports support beyond golf

In-app purchases

4 purchases

Simple Interval Timer

One-time4
  • Espresso$0.99
  • Americano$1.99
  • Ad-free version$2.99
Show 1 more
  • Caramel Cappuccino$2.99
11 purchases

Onform

Subscriptions11
  • Personal Monthly$4.991 Month
  • Individual Standard Monthly$9.991 Month
  • Individual Premium Monthly$14.991 Month
Show 8 more
  • Coach Basic Monthly$19.991 Month
  • Coach Monthly$29.991 Month
  • Coach Standard Monthly 1 Seat$39.991 Month
  • Personal Yearly$49.991 Year
  • Coach Pro Monthly 1 Seat$59.991 Month
  • Team/Academy Monthly$79.001 Month
  • Coach Yearly$299.991 Year
  • Team/Academy Yearly$799.001 Year

Questions

Is Simple Interval Timer free?
Simple Interval Timer is free to download, with in-app purchases available.
Is Onform free?
Onform is free to download, with in-app purchases available.
Which has better reviews, Simple Interval Timer or Onform?
Simple Interval Timer is rated higher. Simple Interval Timer averages 4.9 out of 5 from 5.4K ratings, while Onform averages 4.8 from 8.7K ratings.
Do Simple Interval Timer or Onform have ads?
Simple Interval Timer shows ads; Onform does not.
Which is updated more often, Simple Interval Timer or Onform?
Simple Interval Timer ships an update every 8 months, and Onform every 4 days. Most recently, Simple Interval Timer was updated on October 12, 2026 and Onform on October 11, 2026.

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