Comparison

Target Zone Keeper vs Strength Balance

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

Head to head
About

Target Zone Keeper

This app helps improve cardiovascular fitness by guiding users to maintain their heart rate within an optimal zone for VO2 max enhancement. It offers non-disruptive alerts and visual cues, requiring minimal wrist interaction for seamless workout integration.

Highlights
  • Maintains target heart rate zone
  • Minimal wrist interaction required
  • Simple, intuitive setup
  • Customizable, non-disruptive alerts
  • Personalized heart rate zones
  • Apple Health integration
Read full description

Want to improve your endurance and cardiovascular fitness? Boosting your VO2 max - the amount of oxygen your body uses during intense exercise - is the key.  Target Zone Keeper helps you achieve this by keeping your heart rate in the optimal zone. With a simple, intuitive interface (no complex setup!), it offers visual cues and haptic feedback to keep you focused without interrupting your flow, even when you’re wearing a gloves or simply can’t turn your wrist! Key features - Keeps you in the target heart rate zone with minimal to none wrist interaction - Simple, intuitive setup for easy use right out of the box - Non-disruptive, customizable alerts - Personalized heart rate zones focused on VO2 max improvement - Seamless integration with Apple Health for workout tracking Benefits - Get instant feedback without disrupting your workout flow - Optimize your training specifically for VO2 max improvement

About

Strength Balance

This app helps strength athletes identify and correct muscle imbalances by tracking key lifts and analyzing strength ratios. It provides insights to focus training and build proportional strength across all major movement patterns.

Highlights
  • Track major compound lifts
  • Automatic strength ratio calculations
  • Identify muscle imbalances
  • Personal record tracking
  • Distraction-free interface
  • Private on-device data storage
Features
Read full description

Track Your Lifting Ratios - Build balanced strength across all major lifts. Identify weaknesses. Train smarter. FIND YOUR IMBALANCES Track your squat, bench, deadlift, overhead press, and more. StrengthBalance calculates your strength ratios and highlights muscle group imbalances so you know exactly where to focus your training. INTELLIGENT RATIO ANALYSIS See how your lifts compare to proven strength standards. Are you squat-dominant? Weak overhead? The app provides actionable insights based on your personal lifting data. TRACK YOUR PROGRESS Log every max lift and watch your ratios improve over time. All your training data stays private on your device—no cloud syncing, no tracking, just your lifting history. DESIGNED FOR STRENGTH ATHLETES Whether you're a powerlifter, olympic lifter, or general fitness enthusiast, Strength Balance helps you build proportional strength across all movement patterns. KEY FEATURES • Track all major compound lifts • Automatic strength ratio calculations • Identify imbalances • Personal record tracking • Clean, distraction-free interface

Screenshots

Target Zone Keeper4 screens
Strength Balance4 screens

Verdict

The call

The clearest difference is in-app purchases: Target Zone Keeper at none against Strength Balance's 1. Strength Balance's advantage is update cadence (every 3 weeks vs every 7 months). On price, rating, ratings volume 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. Strength Balance sells 1 one-off in-app purchase. Target Zone Keeper asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Target Zone Keeper against 5.0 for Strength Balance. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Target Zone Keeper ships an update every 7 months, Strength Balance every 3 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 6 level
Target Zone Keeper versus Strength Balance: the parameters behind the verdict, then further details
ParameterTarget Zone KeeperStrength Balance
PriceFreeFree
Rating5.0 (1 ratings)5.0 (2 ratings)
Number of ratings12 — better
Update frequencyEvery 7 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, Apple Watch — betteriPhone
Requires iOS17.6 — better18.6
Further details — not scored
Size2 MB1 MB
Age rating4+4+
DeveloperMargarita BliznikovaJames Panter

Customer experience

Target Zone Keeper

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Strength Balance

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Target Zone Keeper

No in-app purchases

1 purchases

Strength Balance

One-time1
  • Support The Developer$2.99

Questions

Is Target Zone Keeper free?
Target Zone Keeper is free to download, with no in-app purchases.
Is Strength Balance free?
Strength Balance is free to download, with in-app purchases available.
Which has better reviews, Target Zone Keeper or Strength Balance?
Target Zone Keeper and Strength Balance are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Target Zone Keeper or Strength Balance have ads?
Neither Target Zone Keeper nor Strength Balance shows ads.
Which is updated more often, Target Zone Keeper or Strength Balance?
Target Zone Keeper ships an update every 7 months, and Strength Balance every 3 weeks. Most recently, Target Zone Keeper was updated on October 30, 2026 and Strength Balance on November 5, 2026.

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