Mesos: Hypertrophy Programmer
Mesocycle builder & logger
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Mesos is a mesocycle programmer for lifters who already train by volume landmarks and RIR. It builds a hypertrophy block, adds volume week to week, calls your deload, and — unlike most apps — shows you why it made each call.
Programming you can audit
Most autoregulation tools hand you a number and ask you to trust it. Mesos shows its work. Every time it adjusts your sets, it tells you what it read from your logs — your RIR, your soreness, your performance trend — and how that maps to a volume change. If you disagree, you override it. The app adapts to your decision; it doesn't argue.
Built around volume landmarks
Set your MEV (minimum effective volume) and MRV (maximum recoverable volume) per muscle group, or start from sensible defaults and tune as you go. Mesos starts each muscle near its MEV and progresses toward MRV across the block, then deloads before recovery debt stalls your progress.
RIR-driven progression
Log each set with reps, load, and reps in reserve. Mesos reads the trend across sessions and adjusts the next week's volume from your actual performance — not a fixed template. Sets get added when you're recovering well, held when you're not, and pulled back when the data says you're at your ceiling.
Deloads when you need them, not on a fixed calendar
The app watches for the signals that precede a stall — rising RIR at the same load, soreness that doesn't clear, performance flattening — and proposes a deload when they accumulate. You confirm or push the block one more week. Your call, with the evidence in front of you.
A logger that stays out of the way
The free tier is a full training logger: exercises, sets, reps, load, RIR, and per-muscle volume totals. No trial timer, no nag screens. Log your training as long as you like. Upgrade only when you want the programmer to plan and autoregulate the block for you.
Free tier
- Full set and session logger
- Per-muscle weekly volume totals
- MEV/MRV reference per muscle group
Mesos Pro ($9.99/month or $69.99/year, 7-day free trial on yearly)
- Automated mesocycle programming, MEV to MRV
- RIR-based weekly volume autoregulation
- Deload detection with explained reasoning
- Per-set and per-muscle progression history
- Full manual override on every recommendation
Built for intermediate and advanced lifters who train by the numbers. If you already think in volume landmarks, RIR targets, and recoverable volume, Mesos speaks your language.
Terms of Use (EULA): https://hasegi-project-privacy.github.io/mesos-policies/terms-of-service-en.html
Privacy Policy: https://hasegi-project-privacy.github.io/mesos-policies/privacy-policy-en.html
Ratings & Reviews
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The developer, Hasegi Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Hasegi Inc.
- Size
- 19.8 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Mesos Pro (Yearly) $69.99
- Mesos Pro (Monthly) $9.99
- Posterior Chain Pack $4.99
- Delts Specialization Pack $4.99
- Arms Specialization Pack $4.99
- Posterior Chain Pack $4.99
- Arms Specialization Pack $4.99
- Delts Specialization Pack $4.99
- Mesos Pro (Yearly) $69.99
- Mesos Pro (Monthly) $9.99
- Copyright
- © 2026 Hasegi Inc.