Comparison

Appointment Scheduler vs Zone31

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

Head to head
About

Appointment Scheduler

Streamline your business operations with a platform for scheduling appointments, sending automated reminders, and processing payments. Offer clients 24/7 online booking and manage your team's schedules efficiently from any device.

Highlights
  • 24/7 online booking
  • Automated appointment reminders
  • Seamless payment processing
  • Client management
  • Team scheduling
  • Customizable booking site
Features
Read full description

Billdu Appointments provides a comprehensive solution for scheduling and managing appointments, sending reminders, and handling payments, all within a single platform. With Billdu Appointments, you have all the tools necessary to efficiently operate your business from any location. This includes user-friendly online booking for both you and your clients, a point of sale system for tracking customer information, and a secure, swift payment processing feature. The service offers three monthly plans based on team members you add to your business: 1 USER 2-5 USERS UNLIMITED USERS Experience 24/7 online booking, automated appointment reminders, seamless payment processing, and protection against no-shows with Billdu Appointments, accessible on iPhone, iPad, and desktop. ► ENABLE YOUR CLIENTS TO BOOK APPOINTMENTS AROUND THE CLOCK Don't have a website? No worries—Billdu Appointments includes a pre-built booking site, allowing your customers to make reservations at any time, from any location. You can easily manage and accept bookings through your iPhone or iPad. You can personalize layouts, colors, and fonts to match your brand - all with our dedicated Instant Website App. ► SEAMLESS CLIENT TRANSACTIONS Effortlessly accept payments, sell products, or send invoices, all from within a single app. Offer your customers the convenience of saving their card details on Square for swift checkouts. ► REDUCE NO-SHOWS Turn on appointment reminders and request payments to minimize no-shows. ► EFFORTLESS TEAM MANAGEMENT Simplify the task of managing your entire team's schedules, defining their access and permissions Our terms and conditions: https://my.billdu.com/page/condition We care about your privacy; read more at https://my.billdu.com/page/protection

About

Zone31

Features
Read full description

Book your space and gain access to gym facility.

Screenshots

Appointment Scheduler4 screens
Zone313 screens

Verdict

The call

The clearest difference is in-app purchases: Zone31 at none against Appointment Scheduler's 10. Appointment Scheduler's advantage is update cadence (every 10 days vs every 2 months). On price, ads, device support and iOS requirement 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. Appointment Scheduler sells 10 in-app purchases, starting at $7.99 per month. Zone31 asks for nothing beyond the download.

UpkeepUpdate frequency

Appointment Scheduler ships an update every 10 days, Zone31 every 2 months. The most recent releases landed on November 12, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 8 level
Appointment Scheduler versus Zone31: the parameters behind the verdict, then further details
ParameterAppointment SchedulerZone31
PriceFreeFree
Rating4.8 (220 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings220 — better—
Update frequencyEvery 10 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.4 — better
Further details — not scored
Size211 MB64 MB
Age rating4+4+
DeveloperBILLDU LTDGym Flow Limited

In-app purchases

10 purchases

Appointment Scheduler

Subscriptions10
  • 1 user - 1 month$7.991 Month
  • 1 user - 1 month II.$7.991 Month
  • 1 user - 1 month trial1 Month trial$7.991 Month
Show 7 more
  • 2-5 users - 1 month II.$14.991 Month
  • 2-5 users - 1 month$14.991 Month
  • Unlimited users - 1 month$27.991 Month
  • 1 user - 12 months$59.991 Year
  • 1 user - 12 months III.$59.991 Year
  • 2-5 users - 12 months$119.991 Year
  • Unlimited users - 12 months$239.991 Year
None

Zone31

No in-app purchases

Questions

Is Appointment Scheduler free?
Appointment Scheduler is free to download, with in-app purchases available.
Is Zone31 free?
Zone31 is free to download, with no in-app purchases.
Do Appointment Scheduler or Zone31 have ads?
Neither Appointment Scheduler nor Zone31 shows ads.
Which is updated more often, Appointment Scheduler or Zone31?
Appointment Scheduler ships an update every 10 days, and Zone31 every 2 months. Most recently, Appointment Scheduler was updated on November 12, 2026 and Zone31 on October 30, 2026.

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