Comparison

Availability Sync vs OpenHour Social

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

Head to head
About

Availability Sync

Easily share your free time slots for meetings and appointments. This app integrates with your existing calendars and allows for customized sharing messages and professional calendar invites. Streamline your scheduling process and avoid back-and-forth communication.

Highlights
  • Instant availability sharing
  • Calendar integration (iOS, Google, Outlook)
  • Customizable sharing messages
  • Professional calendar invitations
  • Multiple time slot selection
  • Time zone management
Features
Read full description

Availability Sync: Share Your Availability Instantly Transform how you coordinate schedules and share your availability. Whether you're planning meetings, managing appointments, or coordinating with others, share your free time slots in seconds. FEATURES: Smart Sharing - Share available time slots instantly via text or calendar invites - Customize sharing messages for different recipients - Generate professional calendar invitations - Create personalized event titles and descriptions - Share across any messaging platform - Select multiple time slots in one go Calendar Integration - Sync with iOS, Google, and Outlook calendars - View all your calendars in one unified interface - Real-time updates as your schedule changes - Instant conflict detection Availability Management - Select and share multiple time slots at once - Customize work week and weekend schedules - Set preferred meeting durations - Define working hours for different days - Manage time zones effortlessly Time Slot Controls - Choose between 30-minute to 2-hour slots - Select entire days or specific times - Quick bulk selection options - Filter by morning, afternoon, or evening - View calendar conflicts instantly Professional Customization - Personalize event titles and descriptions - Create custom sharing messages - Choose between text or calendar format - Adjust time zone displays for recipients - Flexible date and time formats Perfect for: - Professionals sharing meeting availability - Teams coordinating across time zones - Freelancers managing client appointments - Anyone tired of back-and-forth scheduling emails Additional Features: - Support for light and dark modes - Multiple visual themes - Quick event creation - Privacy-focused design - Regular updates and improvements Download Availability Sync today and transform how you share your availability. No more endless email chains or scheduling confusion - just simple, efficient calendar sharing. Take control of your schedule sharing with Availability Sync.

About

OpenHour Social

This app simplifies coordinating schedules with friends, groups, and clubs. It helps you find overlapping free time and plan events without endless messaging, making social organization faster and more efficient.

Highlights
  • Compare schedules to find overlapping free time
  • Create circles for small groups and clubs for organizations
  • Smart Scheduling for best meeting times
  • Send recommended time slots
  • Real-time updates and notifications
  • View live availability signals
  • Manage club coordination tools
Features
Read full description

OpenHour helps you turn “we should hang out” into an actual plan. Instead of asking everyone when they are free, OpenHour works with the calendar you already use to show when friends overlap. Compare availability, choose a time, invite your people, and keep the plan moving—all in one place. YOUR CALENDAR, MADE SOCIAL Connect your existing calendar and choose which events count as busy. OpenHour uses availability—not private event details—to help friends find time with you. If your class schedule is not already on your calendar, import it from one or more photos or add missing time manually. FIND A TIME THAT ACTUALLY WORKS • See who is available now • Compare calendars with the friends you choose • Find the best confirmed times for a group • Clearly see when someone has not set up a schedule instead of assuming they are free • Preview how your calendar appears to friends when privacy mode is enabled MAKE PLANS, NOT MORE GROUP CHATS Create a plan once you find a time. Every plan can include: • Invitations and RSVP statuses • A dedicated group chat • Shared photos from the event • A history of past plans, conversations, and memories BUILT FOR FRIEND GROUPS AND COLLEGE LIFE OpenHour is designed for schedules that change constantly. Coordinate lunch between classes, study sessions, workouts, weekend plans, club meetings, or spontaneous nights out without sorting through screenshots and scattered messages. CIRCLES AND CLUBS Use circles for the people you plan with most. Clubs provide a shared place for members, events, availability, announcements, and optional general chat. Owners and admins can manage the organization while members stay connected. PRIVACY YOU CAN SEE You control which calendars OpenHour uses and whether friends see event names or simply see that you are busy. Switch between your view and the friend-facing privacy preview so you always understand what others can see. OpenHour is not another calendar you have to manage. It is the social planning layer for the calendar and friendships you already have. Find the overlap. Make the plan. Be there. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Availability Sync4 screens
OpenHour Social4 screens

Verdict

The call

The clearest difference is rating: OpenHour Social at 5.0 against Availability Sync's 4.4. OpenHour Social also leads on review sentiment (100% vs 67%) and iOS requirement (15.1 vs 17.5). Availability Sync's advantage is in-app purchases (none vs 3) and update cadence (weekly vs monthly). On price, ratings volume, ads and device support 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. OpenHour Social sells 3 in-app purchases, starting at $9.99 per month. Availability Sync asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

OpenHour Social holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 5 and 13 respectively. Written reviews point the same way: 67% of Availability Sync's written reviews are positive against 100% of OpenHour Social's.

UpkeepUpdate frequency

Availability Sync ships an update weekly, OpenHour Social monthly. The most recent releases landed on October 14, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
Availability Sync versus OpenHour Social: the parameters behind the verdict, then further details
ParameterAvailability SyncOpenHour Social
PriceFreeFree
Rating4.4 (5 ratings)5.0 (13 ratings) — better
Positive reviews66.7% of reviews100.0% of reviews — better
Number of ratings513 — better
Update frequencyWeekly — betterMonthly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.515.1 — better
Further details — not scored
Size10 MB45 MB
Age rating4+4+
DeveloperDavid FuerstMason Boutwell

Customer experience

Availability Sync

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

OpenHour Social

All ratings13 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews7 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Availability Sync

No in-app purchases

3 purchases

OpenHour Social

Subscriptions2
  • OpenHour Organization Pro$9.991 Month
  • OpenHour Organization Pro$99.991 Year
One-time1
  • OpenHour Personal Pro$4.99

Questions

Is Availability Sync free?
Availability Sync is free to download, with no in-app purchases.
Is OpenHour Social free?
OpenHour Social is free to download, with in-app purchases available.
Which has better reviews, Availability Sync or OpenHour Social?
OpenHour Social is rated higher. Availability Sync averages 4.4 out of 5 from 5 ratings, while OpenHour Social averages 5.0 from 13 ratings.
Do Availability Sync or OpenHour Social have ads?
Neither Availability Sync nor OpenHour Social shows ads.
Which is updated more often, Availability Sync or OpenHour Social?
Availability Sync ships an update weekly, and OpenHour Social monthly. Most recently, Availability Sync was updated on October 14, 2026 and OpenHour Social on October 15, 2026.

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