Comparison

Interval Timer vs LIBRO

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

Head to head
About

Interval Timer

This app helps you manage workout intervals with customizable work and rest periods. It runs in the background and allows music playback, with options to save settings and share progress. Integrates with Apple Health for heart rate monitoring.

Highlights
  • Customizable sets, intervals, and rest times
  • Runs in background and with screen locked
  • Music playlist integration
  • Save settings as templates
  • Apple Health integration for heart rate
  • Post workouts to social media
Features
Read full description

***Free and reliable. Perfect for use at home, at the track or in the gym. We’re proud to introduce this handy little app that helps you keep track of your work and rest periods during workouts. Whether your into cycling, running, lifting weights, exercise, workout, stretching, boxing, MMA or HIT, this interval timer will prove to be an invaluable asset to you. Running foreground, background or with device locked, this reliable app allows you specify an overall time as well as program High/Low intensity interval and rest time between sets. Produced by Polycents! Key Features: - Customizable sets, high/low intensity interval and rest for your own need - Retina display, iOS4 and multitasking - Continue to run even when screen is locked - Play your song or playlist during your workout - Post your workout to Facebook or Twitter - Save settings as templates Customizable Features: - Number of Sets - Countdown Time - Set Time - Low Interval time - High Interval time - Rest Time - First Interval (low or high) - Sound Volume - Timer Sounds - Auto Lock - Vibrate - Pause during Rest - Playlist - New Each Set APPLE HEALTH: -Interval Timer can use Apple Health to show heart rate in Apple Watch App. # Subscription Details # - Monthly and annual subscriptions are available. - Payment will be charged to your iTunes account at confirmation of purchase. - Your subscription will automatically renew unless auto-renew is disabled at least 24 hours before the end of the current subscription period. - Automatic renewals will be charged at the same price you were originally charged for the subscription. - Subscriptions can be managed by going to Account Settings on the App Store after purchase. Terms of Use: https://www.iubenda.com/terms-and-conditions/18915396 Privacy Policy: https://www.iubenda.com/privacy-policy/18915396

About

LIBRO

This AI-powered health assistant helps you track diet, exercise, and lifestyle goals with features like voice logging and a barcode scanner. It offers personalized suggestions and meal planning tools. Access is currently by invitation only from an accredited nutrition professional.

Highlights
  • AI-powered health tracking
  • Voice logging
  • Barcode scanner
  • Personalized suggestions
  • Diet and activity logging
  • Meal planning
Features
Read full description

LIBRO is an AI health assistant designed to track your diet, exercise and lifestyle goals. ** LIBRO is currently available by invitation only ** You must have been invited by an accredited nutrition professional to use this app. Logging has never been this easy! A personalised voice assistant and barcode scanner help you to log foods and a unique memory system automatically suggests what you have previously eaten based on the meal occasion. LIBRO was created by Nutritics, the world's leading provider of professional nutrition software.With key features such as diet and activity logging, recipe and cost analysis, meal planning and a label maker, Nutritics is constantly defining new ways to empower the world to make better food choices. We love feedback! Just drop us a line at support@nutritics.com and let us know how you get on.

Screenshots

Interval Timer4 screens
LIBRO4 screens

Verdict

The call

The clearest difference is review sentiment: Interval Timer at 73% against LIBRO's 4%. Interval Timer also leads on rating (4.5 vs 2.5) and update cadence (every 9 days vs every 7 months). LIBRO's advantage is in-app purchases (none vs 8) and ads (none vs shown). On price and iOS requirement 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. Interval Timer sells 6 in-app purchases, starting at $0.99 per month. LIBRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Interval Timer holds the better App Store score, 4.5 against 2.5. That said, the two scores are not equally well evidenced: Interval Timer has 19K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Interval Timer's written reviews are positive against 4% of LIBRO's.

UpkeepUpdate frequency

Interval Timer ships an update every 9 days, LIBRO every 7 months. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

Scorecard8 real differences · 2 level
Interval Timer versus LIBRO: the parameters behind the verdict, then further details
ParameterInterval TimerLIBRO
PriceFreeFree
Rating4.5 (19K ratings) — better2.5 (2 ratings)
Positive reviews72.9% of reviews — better4.0% of reviews
Number of ratings19K — better2
Update frequencyEvery 9 days — betterEvery 7 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS13.0 — better14.0
Further details — not scored
Size143 MB10 MB
Age rating4+4+
DeveloperNEO PIXEL LABS PTE. LTD.Nutritics Limited

Customer experience

Interval Timer

All ratings19,032 ratings
Positive88.4%
Neutral3.3%
Negative8.3%
Written reviews1,595 reviews
Positive72.9%
Neutral5.8%
Negative21.3%

LIBRO

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews25 reviews
Positive4.0%
Neutral0.0%
Negative96.0%

Bugs and requests

Interval Timer

Reported bugs

3 issues
  • Ads block functionality
  • App freezes or crashes
  • Timer doesn't work in background

Requested features

5 requests
  • Add notes to workouts
  • Provide workout history and analytics
  • Allow syncing with Apple Health
  • Improve Apple Watch integration
  • Add more customization options

LIBRO

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Interval Timer

Subscriptions6
  • Plus - 1 Month$0.991 Month
  • Premium - 1 Month$1.991 Month
  • Plus - 1 Month$1.991 Month
Show 3 more
  • Premium - 1 Month$2.991 Month
  • Plus - 1 Year2 variants$4.991 Year
  • Premium - 1 Year7 Days trial2 variants$9.991 Year
None

LIBRO

No in-app purchases

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is LIBRO free?
LIBRO is free to download, with no in-app purchases.
Which has better reviews, Interval Timer or LIBRO?
Interval Timer is rated higher. Interval Timer averages 4.5 out of 5 from 19K ratings, while LIBRO averages 2.5 from 2 ratings.
Do Interval Timer or LIBRO have ads?
Interval Timer shows ads; LIBRO does not.
Which is updated more often, Interval Timer or LIBRO?
Interval Timer ships an update every 9 days, and LIBRO every 7 months. Most recently, Interval Timer was updated on October 14, 2026 and LIBRO on October 11, 2026.

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