Comparison

HST Log vs Chalk Performance Training

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

Head to head
About

HST Log

This app guides users through a scientifically proven training program designed to maximize muscle growth. It follows a structured eight-week cycle with progressive loading and strategic deconditioning to optimize results for intermediate to advanced weightlifters.

Highlights
  • Scientifically proven training principles
  • Eight-week structured program
  • Progressive load increases
  • Strategic deconditioning periods
  • Focus on mechanical load stimulus
  • Frequent exposure to growth stimulus
Features
Read full description

Hypertrophy Specific Training (HST) is a scientifically proven set of training principles designed to optimize training for muscle size. Hypertrophy Specific Training is a bodybuilding program based on physiological principles of muscular growth discovered through science. Based on recent research, Hypertrophy Specific Training is the most scientifically valid way to train for muscle size and growth. In its most basic form Hypertrophy Specific Training consists of an eight week program broken up into four consecutive two week blocks. The first two weeks are spent doing 15 rep sets, starting out at a percentage of your 15 rep max the first day and progressing the load used over the course of two weeks until on the final day of those two weeks you are lifting your 15 rep max. Your muscles will become conditioned to loads and it will eventually become ineffective at causing growth, so we don't want to spend a long period of time using the same load. After a proper deload your muscles should be receptive to the lighter loads of the early 15s and should respond with growth. The point is not to lift your absolute max each workout, the point is to get growth all throughout the cycle by raising the weight consistently. Hypertrophy Specific Training operates from 4 main principles: 1. Mechanical Load - Mechanical load is the primary growth stimulus. 2. Acute vs. Chronic Stimuli - Muscle must be exposed to the growth stimulus frequently. 3. Progressive Load - Muscle tissue will adapt to the load as you continue to train. 4. Strategic Deconditioning - When progress stops or growth plateaus, it is necessary to take a break from training. Hypertrophy Specific Training is intended for intermediate to advanced weightlifters. If you are unfamiliar with weight lifting you should start with an easier program before running a Hypertrophy Specific Training cycle. Please note: The Hypertrophy Specific Training program was developed by Bryan Haycock. This is not an official HST app and may deviate from information found elsewhere.

About

Chalk Performance Training

Access science-based workouts for any fitness level, at home or in the gym. Track your progress, join a supportive global community, and receive expert guidance to achieve your health and fitness goals.

Highlights
  • At-home and gym workout programs
  • Beginner, intermediate, and advanced options
  • Exclusive workout library
  • Video demonstrations and instructions
  • Progress tracking and performance analysis
  • Global fitness community and discussions
Features
Read full description

The Chalk Performance Training App is the #1 Transformation App with the most effective, science-based workouts for anyone, anywhere and anytime. Chalk Performance Training is more than just a fitness app. It is a global family that works hard, trains together and inspires each other to reach new heights through health and fitness. WORKOUTS: ⁃ Train anywhere, anytime with access to both at home AND gym workout programs. ⁃ Find a workout to suits your needs, with beginner, intermediate or advanced workout options. ⁃ Access our exclusive Chalk Workout Library, with aesthetic, strength, endurance building, and minimal equipment program options. ⁃ Have a new, fresh and exciting workout for every day at your fingertips, ensuring you never get bored and stay motivated to achieve your fitness goals. ⁃ Set up a workout schedule that easily suits your preferences and your life. ⁃ All workouts include clear instructions, video demonstrations and exercise descriptions for proper form and technique to get the best results. PROGRESS TRACKING, SUPPORT & ACCOUNTABILITY: ⁃ Exclusive Chalk Performance Training video content. ⁃ Set goals and track your progress seamlessly within the app to ensure you are moving in the right direction. ⁃ Record your workout stats and analyze your performance over time. ⁃ Information, tips and tricks to educate you on your journey! COMMUNITY: ⁃ Join the Exclusive Chalk Performance Training Community that is a worldwide fitness family. ⁃ Get motivated by seeing what other users are achieving and share your journey and accomplishments too! ⁃ Participate in group discussions, ask questions, and get advice from experienced trainers and Chalk Coaches. ⁃ Discover inspiring success stories, fitness tips, and valuable insights from industry experts. We are on a mission to transform bodies, hearts and lives through health and fitness. If you have a goal, it is our mission to help you achieve it. We’d love to welcome you to our worldwide Chalk Performance Training Family!

Screenshots

HST Log4 screens
Chalk Performance Training4 screens

Verdict

The call

The clearest difference is review sentiment: Chalk Performance Training at 65% against HST Log's 13%. Chalk Performance Training also leads on rating (3.8 vs 3.1) and in-app purchases (none vs 1). HST Log's advantage is update cadence (monthly vs every 5 months) and iOS requirement (9.0 vs 15.0). On price, ads, monetization model 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

Both are free to download. HST Log sells 1 one-off in-app purchase. Chalk Performance Training asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Chalk Performance Training holds the better App Store score, 3.8 against 3.1. That said, the two scores are not equally well evidenced: Chalk Performance Training has 164 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 13% of HST Log's written reviews are positive against 65% of Chalk Performance Training's.

UpkeepUpdate frequency

HST Log ships an update monthly, Chalk Performance Training every 5 months. The most recent releases landed on October 22, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
HST Log versus Chalk Performance Training: the parameters behind the verdict, then further details
ParameterHST LogChalk Performance Training
PriceFreeFree
Rating3.1 (11 ratings)3.8 (164 ratings) — better
Positive reviews12.5% of reviews65.5% of reviews — better
Number of ratings11164 — better
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size18 MB44 MB
Age rating4+4+
DeveloperCharles VanderhoffChalk Performance Training

Customer experience

HST Log

All ratings11 ratings
Positive36.4%
Neutral36.4%
Negative27.3%
Written reviews16 reviews
Positive12.5%
Neutral18.8%
Negative68.8%

Chalk Performance Training

All ratings164 ratings
Positive67.1%
Neutral5.5%
Negative27.4%
Written reviews113 reviews
Positive65.5%
Neutral3.5%
Negative31.0%

Bugs and requests

HST Log

Not enough reviews yet to summarise bugs or requests.

Chalk Performance Training

Reported bugs

4 issues
  • Timer resets when switching apps
  • Inability to log completed sets
  • Workout history not transferring from previous app
  • Difficulty creating custom workouts

Requested features

5 requests
  • Add option to disable audio during workouts
  • Improve ability to enter weights and reps manually
  • Provide more customization options for workouts
  • Implement seamless sync across devices
  • Add support for Apple Watch integration

In-app purchases

1 purchases

HST Log

One-time1
  • HST Pro$4.99
None

Chalk Performance Training

No in-app purchases

Questions

Is HST Log free?
HST Log is free to download, with in-app purchases available.
Is Chalk Performance Training free?
Chalk Performance Training is free to download, with no in-app purchases.
Which has better reviews, HST Log or Chalk Performance Training?
Chalk Performance Training is rated higher. HST Log averages 3.1 out of 5 from 11 ratings, while Chalk Performance Training averages 3.8 from 164 ratings.
Do HST Log or Chalk Performance Training have ads?
Neither HST Log nor Chalk Performance Training shows ads.
Which is updated more often, HST Log or Chalk Performance Training?
HST Log ships an update monthly, and Chalk Performance Training every 5 months. Most recently, HST Log was updated on October 22, 2026 and Chalk Performance Training on October 15, 2026.

Other comparisons