Comparison

STRNTH vs Interval Pulse Timer

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

Head to head
About

STRNTH

Features
Read full description

16 progressive programmes with planned deloads. Track every lift with 1RM, PRs and plateau alerts. Run HIIT with live heart rate. Get a weekly AI coach. Import your training history from another app. Strength training built for lifters in their 30s, 40s and beyond. Most apps are written for 25-year-olds. STRNTH is for people who have lifted before, or are starting now, and want to train for the long game. Open the app, your session is ready, and log a set in two taps. Free forever No card required, no time limit. These features stay free. - Workout logging across sets, reps and weight, including bodyweight, assisted and added load - Built-in programs with multi-week blocks and deloads baked in - Two-tap exercise swaps mid-workout - Rest and tempo timers with voice cues - HIIT preset library with Bluetooth heart rate and smart-trainer support - Body composition with caliper body fat, waist to height and fuel guidance - The STRNTH Index, PRs by muscle group and a year-long trend line - Customisable home dashboard with drag-and-drop widgets - Fatigue-aware readiness chip based on training stress and age - Ask STRNTH library of curated answers on training, recovery and nutrition - Workout history with charts, PR badges and exercise breakdowns - Progress photos with a before and after compare, locked behind Face ID - Import your workout history from other workout apps - Cardio logging for runs, rides, walks and swims, with pace and distance - Quick workouts and targeted sessions by muscle group or time - Adaptive resistance that holds your heart-rate zone on a smart trainer - Training block reviews with a shareable summary after each block - PT summary to hand your numbers to a personal trainer STRNTH Plus (Requires paid plan) Add custom content and unlock the full catalogue. - Custom programs: design a 4, 8 or 12 week block with your own splits and lifts - Custom workouts built from scratch - Custom HIIT with your own blocks and timing - Add your own exercises with muscle group tagging - Full program catalogue and full training history - Log workouts retroactively on past dates STRNTH Pro (Requires paid plan) Everything in Plus, with cloud backup and the age-aware AI coach. - Cloud backup. Sync across devices, reinstall without losing data - Age-aware AI coaching weekly review of readiness, training density and recent volume - Ask STRNTH AI: free-form questions answered with your last six months of training - Save adapted workouts when you change exercises mid-session - Plateau coaching when a lift stalls - Build this week from your recent training - Community programs: publish and enroll with other Pro members - Connect your AI assistant (beta, Pro) and build strength workouts, programmes and HIIT sessions - Build workouts and HIIT with AI by describing them in plain words Paid plan details STRNTH Plus and STRNTH Pro are auto-renewing paid plans, billed monthly or yearly. Payment will be charged to your Apple ID account at the confirmation of purchase. Your paid plan automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your paid plan in your account settings on the App Store. STRNTH is built by Billy, a developer-lifter who got tired of fitness apps that treated him like a 22-year-old. Quiet by design. Honest about pricing. Built for the long game. Terms of use: https://strnthapp.com/terms Privacy policy: https://strnthapp.com/privacy

About

Interval Pulse Timer

Create and run custom interval workouts with named, colored segments and adjustable rounds. Features include audio cues, haptic feedback, and a history tracker. Optimized for focus without distractions.

Highlights
  • Custom interval workouts
  • Apple Watch app integration
  • Live Activity and Dynamic Island support
  • Audio and haptic cues
  • Workout history and habit tracking
  • Offline functionality
Features
Read full description

Build your own HIIT workouts and run them with a clean, focused interval timer. Interval Pulse Timer lets you create custom sequences of named, color-coded intervals — work, rest, warm-up, whatever you need — repeat them for as many rounds as you want, and run them with a big countdown ring, sound cues, and haptic feedback so you always know what's next without looking at your phone. FEATURES • Build unlimited custom workouts with named, colored, timed intervals • Apple Watch app — start any workout from your wrist with full run controls, and finished workouts sync back to History on your iPhone • Live Activity — see the current interval, round, and countdown on the Lock Screen and in the Dynamic Island while a workout runs • Optional warm-up and cool-down segments (with their own colors) that run once, not per round • Repeat any workout for 1–99 rounds, or instantly re-run it from the finish screen • Drag to reorder workouts and intervals • Big countdown ring with round progress and "next up" preview • Audio + haptic cues for interval changes and the final countdown • Screen stays awake during a workout • History tab with streaks, weekly totals, and a habit-tracking calendar • Light, Dark, and System appearance • 100% offline — no account, no ads, no tracking. All data stays on your device. Whether it's Tabata, EMOM, or your own custom split, Interval Pulse Timer keeps the workout simple and the setup out of your way.

Screenshots

STRNTH4 screens
Interval Pulse Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: Interval Pulse Timer at none against STRNTH's 5. Interval Pulse Timer also leads on update cadence (every 2 days vs every 5 days). STRNTH's advantage is device support (4 vs 2) and iOS requirement (15.1 vs 17.0). On price and ads 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. STRNTH sells 5 in-app purchases, starting at $4.99 per month. Interval Pulse Timer asks for nothing beyond the download.

UpkeepUpdate frequency

STRNTH ships an update every 5 days, Interval Pulse Timer every 2 days. The most recent releases landed on September 18, 2026 and August 6, 2026 respectively.

Scorecard4 real differences · 5 level
STRNTH versus Interval Pulse Timer: the parameters behind the verdict, then further details
ParameterSTRNTHInterval Pulse Timer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, Apple Watch
Requires iOS15.1 — better17.0
Further details — not scored
Size74 MB4 MB
Age rating4+4+
DeveloperNext Big Leap LtdNha Hoang

In-app purchases

5 purchases

STRNTH

Subscriptions5
  • STRNTH Plus Monthly$4.991 Month
  • STRNTH Pro Monthly$14.991 Month
  • STRNTH Plus Annual$44.991 Year
Show 2 more
  • STRNTH Pro Founder Yearly$54.991 Year
  • STRNTH Pro Yearly$99.991 Year
None

Interval Pulse Timer

No in-app purchases

Questions

Is STRNTH free?
STRNTH is free to download, with in-app purchases available.
Is Interval Pulse Timer free?
Interval Pulse Timer is free to download, with no in-app purchases.
Do STRNTH or Interval Pulse Timer have ads?
Neither STRNTH nor Interval Pulse Timer shows ads.
Which is updated more often, STRNTH or Interval Pulse Timer?
STRNTH ships an update every 5 days, and Interval Pulse Timer every 2 days. Most recently, STRNTH was updated on September 18, 2026 and Interval Pulse Timer on August 6, 2026.

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