Comparison

Mesos vs CheckIn Pro

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

Head to head
About

Mesos

Features
Read full description

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

About

CheckIn Pro

This app helps physique athletes track their progress with guided, hands-free photo capture and alignment tools. It allows for side-by-side comparisons, logging of weight and measurements, and organizing check-ins by show. Your data is kept private and processed entirely on-device.

Highlights
  • Pose-guided, hands-free capture
  • Ghost overlay for consistent framing
  • Side-by-side and blended photo comparisons
  • Log weight and body measurements
  • Timelapse animations of progress
  • On-device data processing for privacy
Features
Read full description

CheckIn Pro is the check‑in camera built for physique athletes — bodybuilding, classic physique, men's physique, bikini, figure, wellness, and anyone tracking their transformation. Tired of setting timers and running back into frame, only to get inconsistent results? CheckIn Pro takes the hassle out of your weekly check-in and makes it a smooth, repeatable process. Pose-guided, hands-free capture and ghost-overlay alignment mean every shot lines up — so your check-ins stay consistent and you have time to hit the pose just right. CheckIn Pro tracks every pose and how many weeks out you are from your show, keeping your whole prep organized. CAPTURE THE RIGHT WAY • Guided sessions walk you through your division's mandatory poses • Hands‑free: start each pose by voice ("let's go" — or your own catch phrase), motion‑stillness, or a timer • Ghost overlay of your last shot so you match framing every time • Burst Mode takes multiple shots of each pose (optional) SEE YOUR PROGRESS • Side‑by‑side and blended overlay comparisons • Auto‑align two photos; isolate yourself onto a clean background (on‑device) • Export timelapse animations to show your prep over time TRACK THE NUMBERS • Log weight and measurements; see trends and weekly change • Goal countdown with prep progress • Multi‑show career: organize check‑ins by show and compare across years PRIVACY FIRST: YOUR DATA STAYS YOURS • 100% on-device — your check-ins are never uploaded to our servers • No account, no sign-up. Back up or export only when you choose to. • Coached? Send a whole session straight to your coach — email it or drop it in any shared cloud folder. Stop guessing whether you're improving. Check in, line it up, and dominate. CHECKIN PRO PREMIUM Your library is always free to view and compare. Premium unlocks unlimited check‑ins, exports, photo import, background removal, and multiple shows. CheckIn Pro Premium is an auto‑renewing subscription: Monthly $2.99 or Annual $24.99. Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple Account settings. Privacy Policy: https://checkinpro.gamifiedapps.com/privacy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Mesos4 screens
CheckIn Pro4 screens

Verdict

The call

The clearest difference is iOS requirement: Mesos at 13.0 against CheckIn Pro's 15.5. On price, ads, in-app purchases 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. Mesos sells 5 in-app purchases, starting at $9.99 per month and CheckIn Pro sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 9 level
Mesos versus CheckIn Pro: the parameters behind the verdict, then further details
ParameterMesosCheckIn Pro
PriceFreeFree
Rating—4.3 (3 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—3 — better
Update frequency—Every 2 days
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.5
Further details — not scored
Size19 MB91 MB
Age rating4+4+
DeveloperHasegi Inc.Steve Yu

In-app purchases

5 purchases

Mesos

Subscriptions2
  • Mesos Pro (Monthly)2 variants$9.991 Month
  • Mesos Pro (Yearly)7 Days trial2 variants$69.991 Year
One-time3
  • Delts Specialization Pack2 variants$4.99
  • Arms Specialization Pack2 variants$4.99
  • Posterior Chain Pack2 variants$4.99
2 purchases

CheckIn Pro

Subscriptions2
  • CheckIn Pro Monthly$2.991 Month
  • CheckIn Pro Annual Subscription$24.991 Year

Questions

Is Mesos free?
Mesos is free to download, with in-app purchases available.
Is CheckIn Pro free?
CheckIn Pro is free to download, with in-app purchases available.
Do Mesos or CheckIn Pro have ads?
Neither Mesos nor CheckIn Pro shows ads.

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