Comparison

Core vs Engineered Strength

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

Head to head
About

Core

This app helps you stay focused during workouts by managing intervals, work times, and rest periods with clear visual and audio cues. Save custom routines for HIIT, Tabata, or boxing, and track your training history to monitor progress.

Highlights
  • Customizable interval timers
  • Audio cues for work/rest phases
  • Save and reuse workout routines
  • Visual countdown and color coding
  • Workout history and trend tracking
  • Optional Pro features via in-app purchase
Features
Read full description

Keep your focus on the workout Core takes care of the intervals, so you can stay with your training. Set your work time, rest time and sets, then follow a clear countdown and audio cues from the first round to the last. Made for your routine Build a timer for HIIT, Tabata, circuit training or boxing rounds. Save your usual workouts and have them ready when it is time to train again. Know when to move and when to recover A large countdown and distinct work and rest colors make each phase easy to recognize at a glance. Choose audio cues that suit the way you train. See the work you have put in Revisit completed sessions and see your weekly training trends. Your training history gives every session a place beyond the final countdown. Go further with Core Pro Unlock unlimited timers and duplicates, full workout history, monthly and yearly trends, and CSV export. These features require an in-app purchase. Core Pro is optional. Available plans and prices are shown before purchase. If you choose an auto-renewable subscription, payment is charged to your Apple Account at confirmation. It renews automatically unless canceled at least 24 hours before the current period ends. Manage or cancel your subscription in your App Store account settings. Privacy policy: https://yating-900.github.io/core-timer-site/privacy.html Terms of use: https://yating-900.github.io/core-timer-site/terms.html If you have any ideas to improve the App, please contact us via coretimerapp@gmail.com. Your feedback is highly valued!

About

Engineered Strength

Features
Read full description

Engineered Strength: Your Data-Driven Path to Peak Performance Unlock your true potential with Engineered Strength—the precision workout tracker built on data and science. Get a personalized, adaptive plan from your AI Fitness Coach that goes beyond simple rep counts. Whether you want to gain muscle or get toned, see results fast! Includes expert HD video guides and a simple platform to plan and track every workout, at home or in the gym. Why Choose Engineered Strength? AI Fitness Coaches: Get personalized guidance from your own AI coach, offering real-time motivation and generating dynamic exercises, workouts, and programs that adapt to your unique needs and goals. Precision Programming: Access expertly crafted programs for every goal, from building raw strength and muscle to improving endurance and power. Each workout is a finely-tuned blueprint for success. Comprehensive Analytics & Metrics: See what works. Track every detail with intuitive charts and graphs. Monitor your strength gains, workout volume, personal records, and key metrics like reps in reserve and training intensity to make data-driven decisions. Essential Training Tools: Focus on your workout, not the logistics. Our built-in plate calculator saves you time, while customizable rest timers for each set keep your workout on pace. Flawless Form & Technique: Our extensive content library provides clear, step-by-step instructions for every exercise. Learn proper form to maximize muscle activation and prevent injury, turning every rep into a productive step toward your goals. Engineered Strength is for anyone serious about making measurable progress. Whether you're a beginner looking for a guided path or an advanced athlete seeking to optimize every session, our platform provides the tools and intelligence you need to succeed. Stop training in the dark. Download Engineered Strength today and build a smarter, stronger you. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Core4 screens
Engineered Strength4 screens

Verdict

The call

The clearest difference is ads: Core at none against Engineered Strength's shown. Engineered Strength's advantage is update cadence (monthly vs every 33 months). On price, in-app purchases, device support 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. Core sells 3 in-app purchases, starting at $1.99 per month and Engineered Strength sells 4 in-app purchases, starting at $8.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Core ships an update every 33 months, Engineered Strength monthly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Core versus Engineered Strength: the parameters behind the verdict, then further details
ParameterCoreEngineered Strength
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 33 monthsMonthly — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.014.0 — better
Further details — not scored
Size9 MB90 MB
Age rating4+4+
DeveloperYating LuRaymond Jones

In-app purchases

3 purchases

Core

Subscriptions2
  • Monthly$1.991 Month
  • Yearly$9.991 Year
One-time1
  • Lifetime$14.99
4 purchases

Engineered Strength

Subscriptions3
  • Subscription (Monthly)$8.991 Month
  • Subscription (Every 3 Months)$14.993 Months
  • Subscription (Yearly)$24.991 Year
One-time1
  • Remove Ads$7.99

Questions

Is Core free?
Core is free to download, with in-app purchases available.
Is Engineered Strength free?
Engineered Strength is free to download, with in-app purchases available.
Do Core or Engineered Strength have ads?
Engineered Strength shows ads; Core does not.
Which is updated more often, Core or Engineered Strength?
Core ships an update every 33 months, and Engineered Strength monthly. Most recently, Core was updated on November 3, 2026 and Engineered Strength on October 30, 2026.

Other comparisons