Comparison

NS Boxing vs Kettlebell Lab

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

Head to head
About

NS Boxing

This app provides guided boxing workout sessions with customizable round times and voice-guided punch combinations. It offers professional-quality callouts to maximize training effectiveness for all skill levels. The interface is designed for ease of use, even while wearing gloves.

Highlights
  • Customizable workout sessions
  • Voice-guided punch combinations
  • Adjustable round times and rest periods
  • Standard boxing number system or full punch names
  • Journal tool for progress tracking
  • Preset combinations designed by professionals
Features
Read full description

NS Boxing - Your Personal Corner Coach, no frills, no accounts, no data collection, no adds, just boxing workout sessions! First published in 2013, NS Boxing returns in 2025 with a complete rebuild and modernized interface. Part of the New School Army project but perfect for any boxing enthusiast, this essential training companion helps boxers of all levels perfect their technique through guided combination workouts. FEATURES: - Customizable workout sessions with adjustable round times, rest periods, and number of rounds - Voice-guided punch combinations that call out moves in real-time - Option to use standard boxing number system (1-2-3) or full punch names (Jab-Cross-Hook) - Adjustable voice speed and combo frequency to match your training intensity - Multiple voice options for clear audio cues during your workout - Clean, intuitive interface designed for use while wearing gloves - Specialized preset combinations designed by boxing professionals - Pause, resume, and skip functions for complete control of your training session - Simple settings menu to personalize your workout experience MORE: - Journal tool to track your progress and take notes - Links to external sites for the boxing news, associations and training Whether you're hitting the heavy bag, working mitts with a partner, or shadow boxing, NS Boxing delivers professional-quality combination callouts timed to maximize your training effectiveness. Perfect for beginners learning basic combinations, intermediate boxers developing their skills, or advanced fighters maintaining their edge. Train like a professional with NS Boxing - your digital corner coach from New School Army. New for 2025: Completely rebuilt from the ground up with enhanced voice clarity, more combination variations, and improved timing controls to match your skill level.

About

Kettlebell Lab

This app offers personalized kettlebell training with expert-designed programs and customizable workout builders. Track your progress, heart rate with Apple Watch, and utilize various interval training modes. Access a comprehensive exercise library for effective strength building.

Highlights
  • 36 expert-designed programs
  • Custom multi-week plan builder
  • Quick workout options
  • Tabata and HIIT modes
  • Apple Watch heart rate tracking
  • Exercise library with videos
  • Live Activity for Lock Screen tracking
Features
Read full description

Kettlebell Lab is a personalized training app built specifically for kettlebell workouts. Follow any of the 36 expert-designed programs, build your own multi-week plan, or jump into a quick workout. Kettlebell Lab keeps your training organized and your progress on track, all with built-in Apple Watch heart rate tracking. FEATURED PROGRAMS & WORKOUTS (Premium) Skip the planning and start training with a library of expert-designed kettlebell training: • Multi-week featured programs for every level, ranging from 3 to 20 weeks. • Ready-to-go pre-made workouts you can start in seconds. • A range of training styles using single bells, double bells, and bodyweight. QUICK WORKOUTS Pick your exercises, set your weights, and go. Choose your workout format: • Standard — classic sets and rest • Circuit — rounds with multiple exercises • TABATA — high-intensity interval training with a built-in timer Create workouts with nearly every possible kettlebell feature, including EMOM interval timers, AMRAP and AMSAP blocks, laddered sets, and many more. Tap the info button beside any format to see exactly how it runs. TABATA MODE Turn any circuit into high-intensity interval training: • Set your own work interval, rest interval, and round count (20 seconds on, 10 seconds off, 8 rounds by default). • Give every round its own exercise or cycle a single exercise through the whole block. • A spoken count-in and interval cues keep you moving without watching the screen. • Follow the countdown on Apple Watch and from your Lock Screen. PROGRAM BUILDER (Premium) Design structured multi-week kettlebell programs tailored to your goals: • Set weekly schedules with repeating, alternating, or fully custom week patterns. • Configure automatic weight and rep progression, including linear or custom per day. • Add ascending and descending rep ladders for advanced training. • Build Tabata, EMOM, AMSAP, and AMRAP work into any training day. • Manage multiple programs and switch between them. APPLE WATCH HEART RATE Pair with Apple Watch to track heart rate throughout every workout. View live HR, average, and max during your session, then review detailed heart rate charts in your workout history. Log AMRAP reps and follow your Tabata intervals right from your wrist. EXERCISE LIBRARY Browse a complete kettlebell exercise glossary with categories for grinds, ballistics, carries, core work, combos, and complexes. Many exercises include video demonstrations and technique explanations. TEMPLATES (Premium) Save any workout or entire program as a reusable template. Load templates to quickly set up new workouts or programs without rebuilding from scratch. LIVE ACTIVITY Track your workout from the Lock Screen and Dynamic Island. See your current exercise, set count, and timer without opening the app, and even pause or resume without unlocking. Audio cues keep coming while your phone is locked, and your workout pauses automatically for a call, Siri, or an alarm. STATS & HISTORY Review every completed workout with detailed session logs. Premium unlocks heart rate charts, exercise history trends, and program progress analytics. MORE FEATURES • Configurable warm-up and cool-down timers • Workout reminders on your schedule • Sound effects and voice announcements • Dark mode • iCloud sync across devices PREMIUM Start with a 7-day free trial, then keep Premium with a monthly or yearly subscription. Due to numerous requests, we now offer a one-time Lifetime purchase. Download Kettlebell Lab and start training today. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID settings. Lifetime access is a one-time purchase with no auto-renewal. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://multifidus.github.io/kettlebell-lab-privacy/privacy-policy

Screenshots

NS Boxing4 screens
Kettlebell Lab4 screens

Verdict

The call

The clearest difference is review sentiment: Kettlebell Lab at 100% against NS Boxing's 50%. Kettlebell Lab also leads on price (Free vs $0.99) and rating (5.0 vs 3.2). NS Boxing's advantage is in-app purchases (none vs 3) and ratings volume (5 vs 1). On ads and device support 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

Kettlebell Lab is free to download; NS Boxing costs $0.99 up front. Kettlebell Lab sells 3 in-app purchases, starting at $4.99 per month. NS Boxing asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Kettlebell Lab holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: NS Boxing has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of NS Boxing's written reviews are positive against 100% of Kettlebell Lab's.

UpkeepUpdate frequency

NS Boxing ships an update every 9 months, Kettlebell Lab every 5 days. The most recent releases landed on October 23, 2026 and October 17, 2026 respectively.

Scorecard8 real differences · 2 level
NS Boxing versus Kettlebell Lab: the parameters behind the verdict, then further details
ParameterNS BoxingKettlebell Lab
Price$0.99Free — better
Rating3.2 (5 ratings)5.0 (1 ratings) — better
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings5 — better1
Update frequencyEvery 9 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS12.0 — better18.0
Further details — not scored
Size32 MB20 MB
Age rating17+4+
DeveloperPolemics Applications LLCAnatomical Consulting LLC

Customer experience

NS Boxing

All ratings5 ratings
Positive60.0%
Neutral0.0%
Negative40.0%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Kettlebell Lab

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NS Boxing

No in-app purchases

3 purchases

Kettlebell Lab

Subscriptions2
  • Kettlebell Lab Premium7 Days trial$4.991 Month
  • Kettlebell Lab Premium7 Days trial$39.991 Year
One-time1
  • Lifetime Access$79.99

Questions

Is NS Boxing free?
NS Boxing costs $0.99, with no in-app purchases.
Is Kettlebell Lab free?
Kettlebell Lab is free to download, with in-app purchases available.
Which has better reviews, NS Boxing or Kettlebell Lab?
Kettlebell Lab is rated higher. NS Boxing averages 3.2 out of 5 from 5 ratings, while Kettlebell Lab averages 5.0 from 1 ratings.
Do NS Boxing or Kettlebell Lab have ads?
Neither NS Boxing nor Kettlebell Lab shows ads.
Which is updated more often, NS Boxing or Kettlebell Lab?
NS Boxing ships an update every 9 months, and Kettlebell Lab every 5 days. Most recently, NS Boxing was updated on October 23, 2026 and Kettlebell Lab on October 17, 2026.

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