Comparison

Fill In Studio vs Coating OS

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

Head to head
About

Fill In Studio

This app helps fitness studios and gyms fill empty class spots by connecting them with local clients seeking last-minute bookings. Easily post classes, create discounted deals, and manage all your bookings and payments securely.

Highlights
  • Studio dashboard for bookings and revenue
  • Post classes with details and photos
  • Create flash deals for last-minute openings
  • Manage class bookings and attendee lists
  • Secure Stripe Connect payouts
  • Instant notifications for new bookings
Features
Read full description

Fill In Studio is the companion app for fitness studios and gyms on the Fill In platform. Post classes, manage bookings, create flash deals, and grow your business — all from your iPhone. THE FILL IN OPPORTUNITY Every empty spot in your class is lost revenue. Fill In connects you with a community of fitness enthusiasts actively looking for last-minute classes near them. When you have openings, they're ready to book. HOW IT WORKS 1. POST your classes with details, pricing, and photos 2. SET your "Fill In" price (discounted rate for last-minute bookings) 3. CREATE flash deals when you want to fill spots fast 4. WATCH bookings roll in from nearby fitness seekers Fill In handles everything — payments, notifications, and customer communication. You focus on delivering great workouts. KEY FEATURES • STUDIO DASHBOARD — See your bookings, revenue, and active deals at a glance • POST CLASSES — Create classes with descriptions, photos, pricing, and capacity • FLASH DEALS — Offer time-sensitive discounts to fill empty spots quickly • CLASS TEMPLATES — Save your recurring class types for one-tap posting • MANAGE BOOKINGS — View who's coming to each class • EDIT & CANCEL — Update class details or cancel with automatic attendee notifications • ANALYTICS — Track performance, popular classes, and earnings over time • STRIPE CONNECT — Secure, automated payouts directly to your bank account INSTANT NOTIFICATIONS When you post a class or flash deal, Fill In automatically notifies nearby fitness enthusiasts who have enabled alerts. Your class gets visibility exactly when it matters. STRIPE CONNECT PAYOUTS Fill In uses Stripe Connect for secure, reliable payments. After completing a quick onboarding process, you'll receive payouts directly to your bank account. Track your earnings in the app and on the Stripe dashboard. WHO IS FILL IN STUDIO FOR? • BOUTIQUE FITNESS STUDIOS looking to fill last-minute openings • YOGA & PILATES STUDIOS wanting to reach new clients • GYMS offering specialty classes • INDEPENDENT INSTRUCTORS who teach at multiple locations • FITNESS ENTREPRENEURS growing their client base SUPPORTED CLASS TYPES - Yoga (all styles) - Pilates (mat & reformer) - HIIT & Circuit Training - Barre - Indoor Cycling / Spin - CrossFit - Strength Training - Dance & Cardio - Boxing & Martial Arts - And more! SIMPLE PRICING Fill In takes a small platform fee only when you get paid. No monthly fees. No setup costs. No risk. GET STARTED 1. Download Fill In Studio 2. Create your studio profile 3. Complete Stripe Connect onboarding 4. Post your first class It takes just minutes to set up. Start reaching new clients today! Need help? Contact our studio support team: studios@getfillin.com Learn more at: getfillin.com/studios

About

Coating OS

Features
Read full description

CoatingOS is the all-in-one business management app built specifically for floor coating contractors - epoxy, polyurea, polyaspartic, and concrete coating professionals. MANAGE YOUR ENTIRE BUSINESS: - Create and send professional estimates in minutes - Convert estimates to work orders with one tap - Generate invoices and track payments - Schedule jobs and manage your calendar - Store customer information and job history STAY CONNECTED: - Two-way SMS messaging with customers - Automated follow-up workflows - Push notifications for new leads and messages - Access everything from your phone or tablet BUILT FOR CONTRACTORS: - Industry-specific line items and pricing - Photo documentation for jobs - Square payment integration - Works offline - sync when you're back online Whether you're in the field or at the office, Coating OS keeps your business running smoothly. Subscription required. Visit coatingcohort.com for pricing.

Screenshots

Fill In Studio4 screens
Coating OS3 screens

Verdict

The call

Fill In Studio and Coating OS are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Fill In Studio ships an update every 2 weeks, Coating OS every 11 days. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

ScorecardNo meaningful differences
Fill In Studio versus Coating OS: the parameters behind the verdict, then further details
ParameterFill In StudioCoating OS
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 weeksEvery 11 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS14.0 — better15.1
Further details — not scored
Size61 MB120 MB
Age rating4+4+
DeveloperFill In LLCJackson Stephenson

In-app purchases

None

Fill In Studio

No in-app purchases

None

Coating OS

No in-app purchases

Questions

Is Fill In Studio free?
Fill In Studio is free to download, with no in-app purchases.
Is Coating OS free?
Coating OS is free to download, with no in-app purchases.
Do Fill In Studio or Coating OS have ads?
Neither Fill In Studio nor Coating OS shows ads.
Which is updated more often, Fill In Studio or Coating OS?
Fill In Studio ships an update every 2 weeks, and Coating OS every 11 days. Most recently, Fill In Studio was updated on October 30, 2026 and Coating OS on October 28, 2026.

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