Sealed Calendar vs DotDay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sealed Calendar
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Sealed Calendar is the calendar app for those who value privacy above all else. WHY SEALED CALENDAR? In a world where every app wants your data, Sealed Calendar is different. We don't want your data. We can't even see your data. TRUE PRIVACY - Zero data collection - No analytics or tracking - No accounts or sign-ups required - Works completely offline - No cloud dependency MILITARY-GRADE SECURITY - End-to-end encryption using XSalsa20-Poly1305 - Your passcode protects everything - Optional Face ID / Touch ID unlock - Zero-knowledge architecture FULL-FEATURED CALENDAR - Multiple calendars with custom colors - Event reminders and notifications - Attach documents and images (all encrypted) - All-day and timed events - Recurring events (daily, weekly, monthly, yearly) - Search across all your events - Day, week, month, and agenda views YOUR DATA, YOUR CONTROL - All data stays on your device - Export encrypted backups anytime - Transfer to new devices via QR code - Delete everything with one tap - No account needed - ever DEVICE-TO-DEVICE SYNC - Optional sync between your devices - Self-hosted - you control the server - No third-party cloud services - End-to-end encrypted transfers WHO IS THIS FOR? - Privacy advocates - Security professionals - Journalists and activists - Anyone tired of corporate surveillance - People who value digital autonomy Sealed Calendar proves that you don't have to sacrifice features for privacy. Your schedule is personal. Keep it that way.
DotDay
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See your month at a glance. Color-coded dots use each of the Calendar’s color scheme. Scroll the same screen to read every event, grouped by day. Tap a day to jump there. Long-press to add one. Swipe to the next month. Create and edit events and reminders without leaving the app. Type a name to fill the title from Contacts. Choose which calendars appear. Pick a default list for reminders. Your data lives in Apple Calendar, Reminders, and iCloud. No accounts. No clutter. Just your month.
Screenshots
Verdict
The clearest difference is device support: DotDay at 3 against Sealed Calendar's —. Sealed Calendar's advantage is iOS requirement (15.1 vs 18.0). On price and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Sealed Calendar | DotDay |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | — | Every 3 weeks |
| Ads | — | No |
| In-app purchases | No | No |
| Devices | — | iPhone, iPad, Mac — better |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 33 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | John Quigley | William Keene |
In-app purchases
Sealed Calendar
No in-app purchases
DotDay
No in-app purchases









