# Local Calendar Sync — Avoid cross-calendar conflicts > Offline calendar synchronization to prevent conflicts and display accurate availability. (iPhone/iPad app by Robin-Manuel Thiel.) - Source: https://appshunter.io/ios/app/local-calendar-sync/id6478960914 (this page in markdown: same URL + `.md`) - Developer: [Robin-Manuel Thiel](https://appshunter.io/developer/1734610460) - Category: Utilities, Business - Price: $6.99 - Age rating: 4+ - Requires: iOS 17.0 · 3 MB - Languages: American English - Released: 2024-03-06 - Data updated: 2026-09-03 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/local-calendar-sync/id6478960914/reviews.md ## What is Local Calendar Sync? Dealing with multiple calendars in your life? Keep them in sync without exposing confidential information and get rid of cross-calendar conflicts! Whenever you have an appointment in one calendar, this app creates a Blocker or a full copy of that event in your other calendars automatically in the background. What problem does this solve? By keeping your calendars in sync, you ensure that your colleagues or family members can see your correct availability. Your availability status only gets shown based on the events that you have in a single calendar. So your colleagues at work might see you as “free”, even though you have an appointment on another calendar at that time. Why not use an online service? There are several online services that offer to sync your calendars for you. They all require you to provide them with access to your calendar so that they can manage your calendars, which most security departments won’t allow. This app though works fully offline on your computer, uses native tools to access your calendar and does not collect any data. Please note, that this app can only synchronize calendars, that have been added to your device's Internet Accounts in the System Settings. ## Key features - Automatic event synchronization - Creates event blockers or copies - Ensures accurate availability display - Works fully offline - Does not collect user data - Uses native calendar access ## Chart rankings - #199 in Top Paid · Utilities (US App Store) ## Recent user reviews (8 of 8) All indexed reviews: https://appshunter.io/ios/app/local-calendar-sync/id6478960914/reviews.md ### 5/5 — Super app but Missing way to bug report *2026-05-06* App is good. But Please provide a way to report bugs. Currently iPhone Shortcut sync suddenly stopped working. Shows error. ### 5/5 — Perfect *2026-01-21* Works perfectly and reliable. At the beginning I had to find a good configuration for my needs. So had to reset some changes and that worked fluently. Created blockers where deleted within seconds and I could test the new configuration. ### 5/5 — Die einzige vernünftige App für geschlossene Systeme *2025-06-05* Endlich habe ich die richtige App gefunden, die auf sehr einfache Weise das macht was sie soll - lokal eingerichtete Kalender miteinander zu Synchronisieren ohne irgendwelchen Online-Diensten Zugriff auf Firmen-Accounts zu geben. Ich frage mich wieso es tausend Cloud-Dienste aber nur eine Offline-App gibt - egal - diese hier ist top. Ich wünschte mir nur einen anderen Distributionskanal als den App Store. So musste ich mich kurzzeitig mit meinem privaten Apple Account auf dem Firmen PC anmelden, das war mir etwas gruselig. Und für einen extra Apple Account bräuchte man eine eigene Handy-Nr. Vielleicht doch zukünftig ein Lizenz-Key Modell so dass man die App anderweitig kaufen kann? Oder kostenloser Download ohne AppStore und per freiwilliger Spende, dann hätte ich 10€ gegeben :-) ### 4/5 — Almost.. *2025-03-25* I gave this a try as a more private alternative to cloud based services that charge a monthly fee. This app does most of what I need, so thank you to the developer! However for me, it has one fatal flaw. The app can sync based on availability, such as Accept, Decline and Tentative (the Mac’s calendar calls this Maybe). The thing is, when you don’t respond to a meeting invite (a necessary corporate tactic sometimes), it also shows as Tentative. So the sync doesn’t differentiate between a Tentative response and not responded. The Mac Calendar app knows the difference (shown as a grey question mark icon for not responded, and yellow for Tentative), so hopefully the developer could add this small enhancement. I’d love to see an iOS version in future too, as it would be running 24/7, rather than just when my Mac is running. ### 4/5 — Almost Perfect *2025-03-17* I’d starting writing my own quick (and awfully hacky + messy) sync script between my Work + Personal calendar….when I found this which does almost everything I want with just a few clicks. The only thing I haven’t managed to work out is if this can synchronise all day events. They end up being some of the most important for me (i.e. PTO or “Conference”), but currently they aren’t synchronised, despite existing in my local Apple Calendar and Outlook etc. ### 5/5 — Always searched for this *2025-02-04* Really quick and reliable solution for the problem I had with working with multiple Calendars. Would be really nice if you can optionally sync not accepted meetings as well. ### 5/5 — Just what I needed! *2024-03-08* I've been struggling to sync my work calendar to my person (for using with Google Home) and this is exactly what I needed! ### 5/5 — Finally a calender sync app that works *2024-03-08* I was looking for ages for a calender sync app that actualy helps sync my work and private calenders without any hassle. This one gets the job done. No more double bookings for me... ## Frequently asked questions about Local Calendar Sync ### How does Local Calendar Sync prevent cross-calendar conflicts? Local Calendar Sync automatically creates a blocker or a full copy of an appointment from one calendar into your other connected calendars. This ensures that your availability status is always up-to-date and prevents scheduling conflicts. ### Why is Local Calendar Sync better than online calendar sync services? Unlike online services that require access to your calendars, Local Calendar Sync operates fully offline on your device. It uses native tools and does not collect any of your data, offering enhanced privacy and security. ### What calendars can Local Calendar Sync synchronize? This app can only synchronize calendars that have been added to your device's Internet Accounts within the System Settings. It relies on native system integrations for access. ### Is Local Calendar Sync free to use? No, Local Calendar Sync is a paid application. It is available for a one-time purchase price of $6.99. ### Does Local Calendar Sync have ads? No, Local Calendar Sync is ad-free. The application does not contain any advertisements, providing an uninterrupted user experience. ### What devices is Local Calendar Sync compatible with? Local Calendar Sync is available for Mac, iPhone, and iPad. It is designed to work seamlessly across Apple's ecosystem. ### How often is Local Calendar Sync updated? The latest version of Local Calendar Sync is 1.7.1, last updated on June 16, 2026. Updates are provided to ensure continued functionality and compatibility. ### What is the age rating for Local Calendar Sync? Local Calendar Sync has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content. ## Version history (last 2 releases) ### 1.7.1 — 2026-06-16 - Bug fixes for Allow List - UI updates when disabling or deleting a sync rule ### 1.7 — 2026-01-08 No release notes. ## Related topics [local calendar sync](https://appshunter.io/ios/topics/local-calendar-sync) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*