Comparison

Core.X vs Stacksy

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

Head to head
About

Core.X

This platform streamlines gym and fitness studio operations by integrating class scheduling, member engagement, analytics, and payments. It offers members instant booking and progress tracking, while owners gain tools for managing operations, analyzing performance, and processing payments.

Highlights
  • Class scheduling and booking
  • Member engagement tools
  • Progress tracking and goals
  • Community social feed
  • Advanced analytics
  • Integrated payments and billing
  • Custom branding
Read full description

Core.X is the social app for people who take their health seriously. Follow friends, share your wins, set goals that keep you consistent, and find classes at gyms near you, all in one place. You do not need to belong to a gym to use Core.X. Create a free account and you are in. FOR YOU • A feed built around fitness: post workouts, photos, and milestones, and cheer on the people you train with. • Goals that stick: set daily, weekly, and monthly goals, track streaks, and get celebrated when you hit them. • Find a gym: browse studios and gyms in the directory, view their class schedules, and RSVP to a class in seconds. • Join more than one gym: your home gym plus any others you visit, each with its own schedule, feed, and wallet. • Day passes and class packs: pay for a single class or a pack right from your phone, no front desk required. • Direct messages and class invites: message friends and invite them to a class with one tap. • Local deals: members unlock discounts from businesses partnered with their gym. • Your stats: class history, attendance, streaks, and progress, visualized so you can see how far you have come. • Notifications that matter: class reminders, waitlist promotions, schedule changes, and replies to your posts. FOR GYMS AND STUDIOS Core.X is also a complete platform for running a gym, so your community lives in the same app your members already use. • Scheduling: create classes, recurring schedules, capacity limits, waitlists, and instructor assignments. • Check-in: front-desk kiosk, QR code check-in, and attendance tracking for every class. • Memberships and billing: subscriptions, day passes, class packs, and credits, with payments handled through Stripe. • Member insights: see who is attending, who is fading, and who is at risk of cancelling before they do. • Staff roles: owner, admin, instructor, and sales roles with the right permissions for each. • Built-in CRM: track leads, follow-ups, and conversions from first visit to signed member. • Perks program: partner with local businesses to give your members exclusive deals. • Announcements and events: share news, workshops, and challenges with your whole community instantly. • Your brand: your logo, your colors, your gym's identity throughout the app. • Easy migration: import members from Mindbody, Zen Planner, and other platforms. WHY PEOPLE USE CORE.X • One app for training, community, and booking instead of five. • A feed that celebrates progress, not vanity. • Goals and streaks that turn good intentions into habits. • Gyms get higher engagement, lower churn, and less admin work. Whether you train at one studio, bounce between several, or run a gym yourself, Core.X keeps your fitness life in one place. Learn more at corexstudio.net

About

Stacksy

Organize and track your personal peptide protocol with this private application. Manage your entire routine, including what peptides to take and when. Offers monthly and yearly subscription plans for full access.

Highlights
  • Organize peptide protocols
  • Track peptide dosages
  • Schedule peptide intake
  • Private routine management
  • GLP-1 tracking
Features
Read full description

Stacksy is a simple, private way to organize and track your personal peptide protocol. Your whole routine in one place: what you're taking and when to take it. Stacksy requires a Premium auto-renewable subscription to use the app: - Stacksy Premium (Monthly): $9.99 / month - Stacksy Premium (Yearly): $39.99 / year Payment is charged to your Apple ID at purchase confirmation. Your subscription auto-renews unless cancelled at least 24 hours before the period ends. Manage or cancel anytime in your App Store account settings. Privacy Policy: https://stacksy.netlify.app/privacy Terms of Use (EULA): https://stacksy.netlify.app/terms

Screenshots

Core.X4 screens
Stacksy4 screens

Verdict

The call

The clearest difference is in-app purchases: Core.X at none against Stacksy's 2. On price, rating, review sentiment and ratings volume 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. Stacksy sells 2 in-app purchases, starting at $9.99 per month. Core.X 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 Core.X against 5.0 for Stacksy. Both are backed by a comparable volume of ratings — 10 and 16 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Core.X ships an update every 3 days, Stacksy every 2 days. The most recent releases landed on October 1, 2026 and September 18, 2026 respectively.

Scorecard2 real differences · 8 level
Core.X versus Stacksy: the parameters behind the verdict, then further details
ParameterCore.XStacksy
PriceFreeFree
Rating5.0 (10 ratings)5.0 (16 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings1016 — better
Update frequencyEvery 3 daysEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.415.1 — better
Further details — not scored
Size113 MB65 MB
Age rating4+17+
DeveloperWILSON INNOVATIONS LLCVelor4 LLC

Customer experience

Core.X

All ratings10 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Stacksy

All ratings16 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Core.X

No in-app purchases

2 purchases

Stacksy

Subscriptions2
  • Stacksy Pro (Monthly)$9.991 Month
  • Stacksy Pro (Yearly)3 Days trial$39.991 Year

Questions

Is Core.X free?
Core.X is free to download, with no in-app purchases.
Is Stacksy free?
Stacksy is free to download, with in-app purchases available.
Which has better reviews, Core.X or Stacksy?
Core.X and Stacksy are both rated 5.0 out of 5 on the App Store, from 10 and 16 ratings respectively.
Do Core.X or Stacksy have ads?
Neither Core.X nor Stacksy shows ads.
Which is updated more often, Core.X or Stacksy?
Core.X ships an update every 3 days, and Stacksy every 2 days. Most recently, Core.X was updated on October 1, 2026 and Stacksy on September 18, 2026.

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