Comparison

Mountain Project vs Simple Interval Timer

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

Head to head
About

Mountain Project

Discover and navigate to outdoor climbing areas, and find specific routes with detailed filters. Access route beta, photos, and topos offline, and view climbing area statistics. Connect with other climbers in the forum, track your progress, and create to-do lists.

Highlights
  • Find and navigate to climbing areas
  • Sort routes by discipline, difficulty, and rating
  • Search 155,000+ climbing routes offline
  • Download route beta, photos, and topos for offline use
  • View climbing area route statistics and critical info
  • Connect with climbers in the forum
  • Track attempts, sends, and create to-do lists
Features
Read full description

Beyond the Guidebook: The Definitive Rock Climbing Resource. • Find outdoor climbing areas near you, and navigate to them, using the map. This super-handy new feature is one of our personal faves. • The much requested route finder: Easily sort routes by discipline, difficulty, star ranking and more. If a 4-star M9 is your thing, we'll help you find it. • Search our entire database of 155,000+ climbing routes, even offline. • Download route beta, photos, and topos state by state for offline use — because the best crags often have the worst reception. • View a climbing area’s route stats (how many 5.11s are there?) and critical info (when is the raptor closure again?) in a single glance. • Chat, ask questions, or put out a call for partners in our forum. • Rate routes and photos, keep track of attempts & sends, or make a to-do list • It's free to download and free of advertising too. Everything you need, nothing you don't.

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!

Screenshots

Mountain Project4 screens
Simple Interval Timer4 screens

Verdict

The call

The clearest difference is review sentiment: Simple Interval Timer at 85% against Mountain Project's 41%. Simple Interval Timer also leads on rating (4.9 vs 4.6) and iOS requirement (14.5 vs 16.0). Mountain Project's advantage is in-app purchases (none vs 4) and ads (none vs shown). 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. Simple Interval Timer sells 4 one-off in-app purchases. Mountain Project asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Simple Interval Timer holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 4.6K and 5.4K respectively. Written reviews point the same way: 41% of Mountain Project's written reviews are positive against 85% of Simple Interval Timer's.

UpkeepUpdate frequency

Mountain Project ships an update every 3 weeks, Simple Interval Timer every 8 months. The most recent releases landed on September 24, 2026 and September 22, 2026 respectively.

Scorecard7 real differences · 3 level
Mountain Project versus Simple Interval Timer: the parameters behind the verdict, then further details
ParameterMountain ProjectSimple Interval Timer
PriceFreeFree
Rating4.6 (4.6K ratings)4.9 (5.4K ratings) — better
Positive reviews41.1% of reviews84.7% of reviews — better
Number of ratings4.6K5.4K — better
Update frequencyEvery 3 weeks — betterEvery 8 months
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPod, Apple Watch — better
Requires iOS16.014.5 — better
Further details — not scored
Size79 MB10 MB
Age rating4+4+
DeveloperAdventure Projects Inc.0FF

Customer experience

Mountain Project

All ratings4,557 ratings
Positive89.4%
Neutral3.0%
Negative7.6%
Written reviews207 reviews
Positive41.1%
Neutral12.6%
Negative46.4%

Simple Interval Timer

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

User reviews

Mountain Project

From 4.6K App Store ratings

What we love

  • 🗺️ Extensive database of climbing routes
  • 📚 Detailed route information and beta
  • 🗺️ Offline access to downloaded areas
  • 👥 Helpful community contributions
  • 📸 Useful photos and visuals

Room to improve

  • 🐛 Frequent crashes and bugs
  • 🗺️ Inaccurate or outdated map information
  • 🔍 Inefficient search and navigation
  • 💰 Excessive advertising and promotion of other apps
  • 📝 Inability to add comments or photos from the app

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

Bugs and requests

Mountain Project

Reported bugs

5 issues
  • App crashes when opening routes or areas
  • Map not showing all available climbs
  • Incorrect date recording for ticks
  • Inability to delete downloaded areas
  • Login issues and account sync problems

Requested features

5 requests
  • Add ability to add/update routes and areas
  • Implement better offline map functionality
  • Improve search and filtering options
  • Add user profile and route tracking features
  • Enhance community engagement tools

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

In-app purchases

None

Mountain Project

No 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

Questions

Is Mountain Project free?
Mountain Project is free to download, with no in-app purchases.
Is Simple Interval Timer free?
Simple Interval Timer is free to download, with in-app purchases available.
Which has better reviews, Mountain Project or Simple Interval Timer?
Simple Interval Timer is rated higher. Mountain Project averages 4.6 out of 5 from 4.6K ratings, while Simple Interval Timer averages 4.9 from 5.4K ratings.
Do Mountain Project or Simple Interval Timer have ads?
Simple Interval Timer shows ads; Mountain Project does not.
Which is updated more often, Mountain Project or Simple Interval Timer?
Mountain Project ships an update every 3 weeks, and Simple Interval Timer every 8 months. Most recently, Mountain Project was updated on September 24, 2026 and Simple Interval Timer on September 22, 2026.

Other comparisons