Yaca vs SiCal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Yaca
This smart organizer offers a clear and simple interface to manage all your events and appointments across multiple calendars. Quickly schedule, edit, and view your agenda with features like location mapping, reminders, and instant messaging to attendees.
- Clear event overview (daily, weekly, monthly, yearly, agenda)
- Quick event creation and editing
- Location mapping for appointments
- Event reminders and birthday/holiday notifications
- "I'll arrive later" feature
- Customizable calendar colors
- Time zone settings
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Manage all your events and calendars with Yaca The new smart calendar and organizer for your iPhone and iPad. Yaca stands out with simple and clear design. So you can manage your calendars quickly and reliably and see all your appointments at a glance. You run late? No problem! Send prepared texts immediately via email or messenger apps to event invitees. EASY SCHEDULING • clear and detailed overview of all events on daily, weekly, monthly, yearly and agenda level • create and edit new events quickly and comfortable • individual setting of repetitive events • add location information to each appointment and see it straight on the map • get reminders for each event • never forget birthdays and holidays • individual time zone settings • “I´ll arrive later“-feature • choose a different color for each calendar
SiCal
This private calendar app utilizes a decentralized network for secure storage and management of your schedule. It allows for event creation, organization across multiple calendars, and import of existing files, all without requiring a traditional account. Your data is secured by a recovery phrase for easy restoration and control.
- Decentralized calendar storage
- Event creation and organization
- Multiple calendar management
- ICS file import
- Event reminders and alerts
- Restore access with recovery phrase
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SiCal is a private calendar app built on the decentralized Sia network. Create, organize, and manage your schedule without relying on a traditional central server or account-based calendar platform. With SiCal, you can create and edit events, manage multiple calendars, import calendar files like ICS, and stay on top of your schedule with event reminders and alerts. Your calendar data is tied to your recovery phrase, giving you a portable way to restore access and keep control of your information. Key features: -Decentralized calendar storage powered by Sia -Create, edit, and organize events across calendars -Import existing calendar files including ICS -Event reminders and alerts -Sync support to keep your calendar up to date -Restore access with your recovery phrase -No traditional account required -SiCal is designed for people who want a calendar that is practical, mobile-friendly, and more aligned with user ownership and privacy. This app was funded by a grant from the Sia Foundation.
Screenshots
Verdict
The clearest difference is rating: SiCal at 5.0 against Yaca's 4.1. SiCal also leads on update cadence (every 9 days vs every 2 months) and iOS requirement (13.0 vs 16.0). Yaca's advantage is ratings volume (19 vs 1). On price, ads, in-app purchases and monetization model 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.
SiCal holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Yaca has 19 ratings behind it against 1, so its average is the more settled of the two.
Yaca ships an update every 2 months, SiCal every 9 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Yaca | SiCal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (19 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 61.5% of reviews | — |
| Number of ratings | 19 — better | 1 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 32 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | mvolution GmbH | Mitchell May |
In-app purchases
Yaca
No in-app purchases
SiCal
No in-app purchases









