Simplifythis vs Fill In Studio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Simplifythis
Manage and invoice clients directly from your mobile device. Track unbilled charges and create invoices instantly after providing services. View client details and manage charges efficiently.
- Client management
- Charge tracking
- Instant invoicing
- On-the-go management
- View client details
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Simplifythis is the complete business-management suite for small service businesses — your booking website, scheduling, classes, and card payments, together in one place. Made for physiotherapists, tutors, personal trainers, coaches, salons, and studios. YOUR OWN BOOKING WEBSITE • A beautiful, branded website with online booking built in — no web designer needed • Clients discover your services and classes and book in seconds • Your brand, your site — it looks like it was made just for you SMART SCHEDULING • Manage appointments across your whole team in clean day and week views • Recurring appointments, per-staff calendars, and fast rebooking • Automatic email and text reminders that cut no-shows GROUP CLASSES, MADE SIMPLE • Create classes and courses, and manage enrollment, capacity, and waitlists • One-tap close-out: mark attendance and charge the whole class together • Sell class packs and track prepaid credit automatically BILLING & CARD PAYMENTS • Send professional invoices and get paid by card, powered by Stripe • Auto-bill on a schedule and charge saved cards automatically • Track balances, packages, and credit for every client and household CLIENT SELF-SERVICE • Clients book, reschedule, and pay from their phone or your website • Secure card payments, instant receipts, and booking confirmations • Households share one account, so families and teams book and pay together ALL IN ONE PLACE • Complete client records, notes, and history • Staff roles and permissions for your whole team • A smart dashboard that surfaces exactly what needs you today Simplifythis gives small businesses what the big platforms promise — without the complexity. Set up in minutes and run your whole day from your pocket. Card payments are processed securely by Stripe. Questions? Email support@simplifythis.com.
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.
- 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
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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
Screenshots
Verdict
The clearest difference is rating: Fill In Studio at 5.0 against Simplifythis's 4.0. Fill In Studio also leads on update cadence (every 2 weeks vs every 3 months) and iOS requirement (14.0 vs 16.4). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Fill In Studio holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
Simplifythis ships an update every 3 months, Fill In Studio every 2 weeks. The most recent releases landed on October 2, 2026 and October 10, 2026 respectively.
| Parameter | Simplifythis | Fill In Studio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 14.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | SimplifyThis | Fill In LLC |
Customer experience
Simplifythis
Fill In Studio
In-app purchases
Simplifythis
No in-app purchases
Fill In Studio
No in-app purchases
Questions
Is Simplifythis free?
Is Fill In Studio free?
Which has better reviews, Simplifythis or Fill In Studio?
Do Simplifythis or Fill In Studio have ads?
Which is updated more often, Simplifythis or Fill In Studio?
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