Comparison

OAK POS vs Fill In Studio

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

Head to head
About

OAK POS

This multi-channel point-of-sale system helps rental businesses manage in-store and online orders. It offers cloud-based pricing and availability management, supporting multiple locations and users. The system integrates with existing merchant accounts for seamless transactions.

Highlights
  • Multi-channel order taking (in-store & online)
  • Cloud-based pricing and availability management
  • Supports multiple store locations
  • Unlimited user accounts
  • Seamless online order synchronization
  • Discount and coupon management
Features
Read full description

OAK is complete rental business management with a point of sale built for how rental stores actually work — at the counter, out on the floor, and online. Take orders in-store on iPhone or iPad, and let customers book themselves through your own web store. Pricing, availability, and inventory live in the cloud, so every channel stays in sync automatically. BUILT FOR RENTALS - Reservations and availability across multiple locations - Rentals and retail in a single order - Customer records with rental history - Discounts, coupons, and affiliate campaigns PAYMENTS - Accept cards in person with a Stripe card reader - Save cards on file for damages and late returns - Online bookings paid up front, synced instantly RUNS YOUR WAY - Unlimited users on every plan - Switch between locations without logging out - No booking fees for your customers — the price they see is the price they pay

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

Screenshots

OAK POS4 screens
Fill In Studio4 screens

Verdict

The call

The clearest difference is update cadence: Fill In Studio at every 2 weeks against OAK POS's every 6 weeks. On price, rating, ratings volume and ads 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for OAK POS against 5.0 for Fill In Studio. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

OAK POS ships an update every 6 weeks, Fill In Studio every 2 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard1 real difference · 9 level
OAK POS versus Fill In Studio: the parameters behind the verdict, then further details
ParameterOAK POSFill In Studio
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.014.0 — better
Further details — not scored
Size71 MB61 MB
Age rating4+4+
DeveloperOak, IncFill In LLC

Customer experience

OAK POS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Fill In Studio

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

OAK POS

No in-app purchases

None

Fill In Studio

No in-app purchases

Questions

Is OAK POS free?
OAK POS is free to download, with no in-app purchases.
Is Fill In Studio free?
Fill In Studio is free to download, with no in-app purchases.
Which has better reviews, OAK POS or Fill In Studio?
OAK POS and Fill In Studio are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do OAK POS or Fill In Studio have ads?
Neither OAK POS nor Fill In Studio shows ads.
Which is updated more often, OAK POS or Fill In Studio?
OAK POS ships an update every 6 weeks, and Fill In Studio every 2 weeks. Most recently, OAK POS was updated on November 1, 2026 and Fill In Studio on October 30, 2026.

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