Simple Calendar

Acquired

Country: Israel (IL)
Founded: 2016
Developer: Simple Mobile Tools (based in Israel)
Pricing: Free (open-source)
Open source: Yes
Platforms: Android

Indexes

Calendar

Overview

Simple Calendar is an offline, full-featured calendar app for Android that functions as an agenda planner, appointment scheduler, and event organizer. It supports viewing events in monthly, weekly, or daily formats with reminders and widgets. The app emphasizes privacy by storing data locally without requiring internet access or cloud accounts, targeting users seeking a lightweight, ad-free alternative to stock calendar apps.

Key Features

Offline Functionality - Stores events locally on the device without internet requirement.
Customizable Views - Supports month, week, day, and agenda views with color coding.
Event Reminders - Configurable notifications for appointments and recurring events.
Widgets - Home screen widgets for quick agenda access.
Recurring Events - Supports daily, weekly, monthly, and yearly repetitions.
Customization - Adjustable themes, fonts, and event colors.
Task Integration - Combines calendar with simple to-do list features.

Pricing

Plan	Price	Includes
Free Version	Free	Full calendar features, offline access, widgets, no ads.
Pro/Donation Version	One-time purchase (historical)	Same as free; supported development pre-acquisition.

Platforms & Requirements

Runs exclusively on Android devices. No minimum requirements beyond standard Android compatibility. Lacks native support for iOS, Windows, or web platforms.

Integrations & Ecosystem

Local file import/export (ICS format)
Google Calendar sync (optional)
CalDAV support
Event sharing via device sharing
Widget integration with home screen
Alarm and notification system

Alternatives

App	Difference
Google Calendar	Cloud-based with automatic syncing across devices; requires internet.
aCalendar	Similar offline Android calendar but with more widget options and themes.
Business Calendar 2	Advanced features like task management and weather integration; freemium model.
DigiCal	Highly customizable UI with dashboard views; supports multiple calendar accounts.

Reputation

Simple Calendar is praised for its privacy-focused, offline design and lack of ads, appealing to users avoiding data collection by big tech. Criticisms arose after its 2022 acquisition by ShuffleCat, which introduced ads and raised concerns over the shift from fully open-source principles. It remains popular among Android users valuing simplicity, though some have migrated to forks like Fossify Calendar.

Sources (8)