Compared August 2026 · every price and feature below was checked against Local Calendar Sync’s own site and App Store listing on 28 August 2026. These change — check the Local Calendar Sync site and App Store listing before deciding.
The established on-device option. Same idea, two years older, twice the price.
These two do the same job the same way. Both copy events between calendars already on your Apple device, both run entirely on-device with no account and no server, and both can write a plain “Busy” blocker instead of the real event. If you were expecting one of them to be the privacy-respecting choice, they both are.
Local Calendar Sync got there first. It has been on the App Store since March 2024 and is on version 1.7.1; this app arrived in July 2026. Two extra years of other people finding the edge cases counts for a lot. Against it: a lower price, an open codebase, and finer control over which events cross over.
| Calendar Mirror | Local Calendar Sync | |
|---|---|---|
| Price | $2.99 once · free from source | $6.99 once |
| Where it runs | Entirely on your device | Entirely on your device |
| Account required | None | None |
| Platforms | iPhone, iPad, Mac | iPhone, iPad, Mac |
| On the App Store since | July 2026 | March 2024 |
| Open source | Yes — MIT, and you can build it yourself for nothing | No |
| Redacting events | Busy-only, with your own label and an optional prefix | Blocker instead of the full event |
| Filters | Declined, unanswered, cancelled, all-day, free, duration bounds, title, time-of-day and weekday window | Keywords, availability status, allow and ignore lists |
| Duration filters | Yes — shorter or longer than N minutes | Not published |
| RSVP filters | Skip meetings you declined or have not answered | Not published |
| Per-event override | Yes — a tag in an event’s notes beats the rule | Not published |
| Apple Shortcuts | No | Yes |
| Background schedule | Every 5–60 minutes, your choice | Every 10 minutes on Mac; background refresh on iOS |
| Warns you if it breaks | Yes — an all-day warning in the destination calendar | Not published |
Not a privacy comparison. Local Calendar Sync runs on your device, with no account and no server, exactly as Calendar Mirror does. Neither is the private one; the differences are elsewhere.
One limit they state, and which applies equally here: it can only sync calendars that have been added to your device’s Internet Accounts. Neither app can reach a calendar your Mac or iPhone cannot already see.
None of these are coming later. If you need one of them, buy something else:
One purchase covers iPhone, iPad and Mac. Calendar Mirror is not affiliated with Local Calendar Sync in any way, and this page is written by Calendar Mirror’s author.