If you're researching calendar sync tools, you've probably seen SyncThemCalendars. It's a solid option. It syncs calendars. It works. But we built SYNCDATE because we thought it could be better — faster, simpler, and more transparent about how your data is handled. According to Harvard Business Review, workers lose an average of 9% of their productive time toggling between applications — making fast, reliable calendar sync a real productivity win.
Let's be honest about the comparison. SyncThemCalendars supports Outlook and Apple Calendar. SYNCDATE supports Google Calendar and Microsoft Outlook/Office 365 via the Microsoft Graph Calendar API. If you need Apple Calendar support today, SyncThemCalendars is a valid choice. But if your calendars are on Google, Outlook, or both, and you value speed and privacy, SYNCDATE is worth considering.
What SyncThemCalendars Does
SyncThemCalendars is purpose-built for calendar sync, just like SYNCDATE. It's been around for a while and has a reasonable user base. The core feature set:
- Syncs across Google Calendar, Outlook, and Apple Calendar
- Free tier with 2 calendars
- Paid plans starting around $4.99/month
- Two-way sync (events propagate bidirectionally)
- Mobile app available
- Decent integration ecosystem
If you're on multiple platforms (a mix of Google, Outlook, and Apple), SyncThemCalendars gives you what you need: a single tool that bridges them all.
SYNCDATE's Advantages
We built SYNCDATE with a specific focus: do calendar sync better, faster, and more transparently.
Speed: SYNCDATE syncs in approximately 4 seconds using Google Calendar push notifications and Microsoft Graph webhooks. SyncThemCalendars uses polling (checking for changes at intervals), which means slower sync times and more server overhead. When you add an event or make a change, SYNCDATE reflects it almost instantly. SyncThemCalendars might take several minutes, depending on your plan.
Price: SYNCDATE Starter is €1.99/month for 9 calendars. That's roughly one-third the cost of SyncThemCalendars' paid tier. Our Pro plan is €8.99/month for 30 calendars. The price difference is significant, especially if you're managing multiple calendars.
Privacy by Design: SYNCDATE shows events as "Busy" by default without exposing event details. This means colleagues can see you're unavailable without reading your meeting notes or seeing who you're meeting with. We make this behavior clear and controllable. Privacy isn't an afterthought — it's how the product works.
Transparency: We're open about our infrastructure. We host in the EU (Hetzner, Germany), use Cloudflare CDN, and encrypt all tokens with AES-256, complying with GDPR data protection requirements. We publish these details because you should know where your data lives and how it's protected. SyncThemCalendars doesn't provide the same level of transparency about their infrastructure and security practices.
User Experience: SYNCDATE is intentionally minimal. We removed everything that wasn't about sync. The setup takes 2 minutes. SyncThemCalendars has more features, which means more options — but also more complexity.
Undo and Cleanup: SYNCDATE tracks sync history and gives you cleanup tools. If you disconnect a calendar, we help you remove the events we added. SyncThemCalendars doesn't have the same level of control here.
SyncThemCalendars' Advantages
We should be fair. SyncThemCalendars has real strengths:
Apple Calendar Support: If you use Apple Calendar alongside Google and Outlook, SyncThemCalendars supports all three. SYNCDATE supports Google and Outlook but not Apple Calendar yet.
Established Product: SyncThemCalendars has been around longer and has a larger user base. If stability and user community matter to you, that's worth something.
Mobile App: SyncThemCalendars has a mobile app for managing syncs on the go. SYNCDATE is web-based.
Who Should Use SYNCDATE vs. SyncThemCalendars
Use SYNCDATE if:
- Your calendars are on Google, Outlook, or both
- You want the fastest sync speed (4 seconds vs. 5-15 minute polling)
- Price matters to you (€1.99 vs. ~$4.99/month is a real difference at scale)
- You care about privacy and transparency
- You want a simple, distraction-free tool
Use SyncThemCalendars if:
- You need Apple Calendar sync alongside Google and Outlook
- You need a mobile app for calendar management
- You prefer an established product with a larger user community
| Feature | SyncThemCalendars | SYNCDATE |
|---|---|---|
| Free Tier | 2 calendars | 2 calendars |
| Paid Price | ~$4.99/month | €1.99/month |
| Google Calendar | Yes | Yes |
| Outlook | Yes | Yes |
| Apple Calendar | Yes | No |
| Sync Speed | 5-15 min (polling) | ~4 sec (webhook) |
| Privacy Controls | Limited | "Busy" default |
| Two-Way Sync | Yes | Yes |
| Event Cleanup | No | Yes |
| Hosting Transparency | Not disclosed | EU (Hetzner) |
| Mobile App | Yes | No (web-based) |
| Setup Time | 5-10 minutes | 2 minutes |
| Encryption Details | Not public | AES-256 (public) |
Comparison as of February 2026
Honest Assessment
SyncThemCalendars is the better choice if you need Apple Calendar support. We won't pretend otherwise. Apple Calendar support is not yet available on SYNCDATE.
SYNCDATE is the better choice if you use Google, Outlook, or both and you care about speed, price, and privacy. We've optimized every part of the experience around those three things.
FAQ
Is SyncThemCalendars faster than SYNCDATE?
No. SYNCDATE syncs in approximately 4 seconds using webhooks. SyncThemCalendars uses polling, which means checking for changes at intervals (typically 5-15 minutes depending on your plan). For real-time sync, SYNCDATE is significantly faster.
Can I sync Outlook with SYNCDATE?
Yes. SYNCDATE fully supports Microsoft Outlook/Office 365 via the Microsoft Graph Calendar API. You can sync Google-to-Outlook, Outlook-to-Outlook, or Google-to-Google calendars. If you need Apple Calendar sync, SyncThemCalendars is your option.
Which is cheaper, SYNCDATE or SyncThemCalendars?
SYNCDATE is cheaper. We start at €1.99/month for Starter (9 calendars). SyncThemCalendars starts around $4.99/month. For the same feature set, SYNCDATE costs roughly one-third as much.
Why does SYNCDATE use "Busy" instead of showing full event details?
Privacy. We believe you shouldn't have to choose between keeping your calendars in sync and protecting your privacy. Showing events as "Busy" means colleagues can see you're unavailable without reading your notes or knowing who you're meeting. You can adjust this in settings if you prefer.
Does SYNCDATE have a mobile app like SyncThemCalendars?
Not currently. SYNCDATE is a web-based tool designed to work in the background. Once you set up sync, you don't need to manage it from your phone. SyncThemCalendars offers a mobile app if you prefer app-based management.
Which Tool Should You Choose?
If your calendars are on Google, Outlook, or both, and you want the fastest, cheapest sync experience with clear privacy controls, SYNCDATE is built for you. If you need to bridge Google, Outlook, and Apple Calendar, SyncThemCalendars remains an option for Apple Calendar support specifically.