Comparison

IntervalGuide vs Heartie

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

Head to head
About

IntervalGuide

Features
Read full description

Your workout. Your rules. IntervalGuide is a fully customizable interval timer for HIIT, Tabata, boxing, and circuit training - built to work exactly the way you train. Design your interval workout block by block: set work and rest periods, add rounds, choose audio cues, and train in the right heart rate zone. Shake your iPhone to pause or resume - no need to touch the screen mid-round. Whether you're doing HIIT, boxing rounds, kettlebells, running intervals, or strength-training rest periods, IntervalGuide adapts to your routine, not the other way around. HANDS-FREE CONTROL Shake your iPhone to pause or resume - no need to remove your gloves, stop your set, or fumble with your screen. Perfect for boxing, kettlebells, winter runs, or any workout where touching your phone isn't an option. FULLY CUSTOMIZABLE TIMERS Build workouts your way: - Create unlimited interval blocks with custom durations - Set work, rest, and preparation phases - Add rounds and repeats to any block - Assign colors to visually distinguish each phase - Save and reuse your favorite workouts REAL-TIME HEART RATE Connect your heart rate monitor and train in the right zone: - Polar sensors supported out of the box - Generic Bluetooth Low Energy (BLE) heart rate devices - Live HR display during workouts - Customizable heart rate zones - Apple Health integration AUDIO & HAPTIC CUES Stay focused without watching your screen: - Voice announcements for phase changes - Boxing bell and other sound effects - Vibration alerts to keep you on track - Works with headphones and AirPods APPLE WATCH COMPANION Control your workout from your wrist: - Start, pause, and stop from your Apple Watch - See timer and heart rate at a glance - Full data sync between iPhone and watch WORKOUT HISTORY Track your progress over time: - Automatic session logging - Review past workouts with full details - Heart rate data for every session - Apple Health sync BUILT FOR REAL TRAINING No bloat, no social features, no accounts required. Just a powerful, reliable interval timer that runs in the foreground and never quits on you mid-workout. Works great for: - Boxing & MMA rounds - HIIT & Tabata - Strength training rest periods - Yoga & stretching flows - Running intervals - CrossFit-style WODs - Physical therapy exercises Download IntervalGuide and build the interval timer that fits your training - not someone else's. SUBSCRIPTION IntervalGuide Premium removes all ads, unlocks your full workout history with detailed session stats and HR charts, and lets you export sessions as CSV, Excel, JSON or Text. - IntervalGuide Premium: auto-renewing monthly subscription - Free for the first week for new subscribers, then the price shown in the app - Payment is charged to your Apple Account at confirmation of purchase - Renews automatically unless cancelled at least 24 hours before the end of the current period - Manage or cancel anytime in your Apple Account settings Terms of Use (EULA): https://tremia.app/apps/interval-guide/terms-of-service Privacy Policy: https://tremia.app/apps/interval-guide/privacy-policy

About

Heartie

Features
Read full description

β€œEver wondered how much you should increase your workout intensity? Now your heart rate can tell you.” Hello, this is Heartie. :) I don’t believe that being good at exercise means simply enduring longer or pushing yourself harder no matter what. Some days, your heart rate rises quickly even with a light run. Other days, your body keeps up well even when you move a little harder. Workout intensity can change every day. Your condition, fatigue level, and recovery state are different each time. But! It’s often hard to tell by feeling alone whether you are pushing too hard or whether it’s okay to raise the intensity a little more. Heartie was created for exactly those moments. Based on your heart rate, Heartie helps you set the right interval workout intensity for your body and stay within the appropriate range during exercise. So, go ahead and start! - Key Features of Heartie 1. Heart Rate-Based Workouts That Fit Your Body Adjust your workout intensity based on how you feel today. Heartie is not about exercising as hard as possible. It is about training smarter according to your heart rate. 2. Create Your Own Interval Routine Set your high-intensity intervals, recovery intervals, and number of repetitions. Instead of following a fixed workout, you can create a routine that fits your goals and fitness level. 3. Heart Rate Zone Alerts When you move outside your target heart rate zone during a workout, Heartie notifies you with sound and haptics. Reduce overpacing and maintain the right intensity without becoming too relaxed. 4. Keep a Record of Today’s Workout Check your workout records by date and look back on what intensity you trained at and how long you maintained it. 5. Grow Consistently Without Overdoing It Exercise is not about pushing yourself all at once. What matters is repeating workouts at an intensity that fits your body. Heartie helps make your daily workouts safer and clearer. - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Privacy Policy: https://pinto-ostrich-491.notion.site/Heartie-Privacy-Policy-eng-v-1-0-0-384bb891ec33800eb2d5d75ec3f57edd?source=copy_link

Screenshots

IntervalGuide4 screens
Heartie4 screens

Verdict

The call

The clearest difference is ads: Heartie at none against IntervalGuide's shown. Heartie also leads on update cadence (every 4 days vs every 11 days). IntervalGuide's advantage is iOS requirement (16.0 vs 18.6). On price, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. IntervalGuide sells 1 in-app purchase, starting at $2.99 per month and Heartie sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

IntervalGuide ships an update every 11 days, Heartie every 4 days. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

Scorecard3 real differences Β· 3 level
IntervalGuide versus Heartie: the parameters behind the verdict, then further details
ParameterIntervalGuideHeartie
PriceFreeFree
Update frequencyEvery 11 daysEvery 4 days β€” better
AdsYesNo β€” better
In-app purchasesYesYes
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS16.0 β€” better18.6
Further details β€” not scored
Size54 MB21 MB
Age rating4+4+
DeveloperAmir Tairi2026 Gnosis

In-app purchases

1 purchases

IntervalGuide

Subscriptions1
  • IntervalGuide Premium7 Days trial$2.991 Month
2 purchases

Heartie

Subscriptions2
  • Premium plan$2.991 Month
  • Premium plan (year)$19.991 Year

Questions

Is IntervalGuide free?
IntervalGuide is free to download, with in-app purchases available.
Is Heartie free?
Heartie is free to download, with in-app purchases available.
Do IntervalGuide or Heartie have ads?
IntervalGuide shows ads; Heartie does not.
Which is updated more often, IntervalGuide or Heartie?
IntervalGuide ships an update every 11 days, and Heartie every 4 days. Most recently, IntervalGuide was updated on September 10, 2026 and Heartie on September 21, 2026.

Other comparisons