Jean-Luc Makiola
08fd3467ad
Appearance had become the drawer everything got tossed into: 18 rows, half of which weren't appearance at all. Views held three. Backup hid inside the calendar manager, where nobody goes looking for "keep a copy of my calendars". The hub now reads as three labelled groups — look & behaviour, data, app — and everything sits under the heading it belongs to: - Appearance keeps theme/colour, the two fonts, and the app name (18 → 6). - Views takes the per-view settings, grouped by the view they change: all views, month, week & day, agenda — then the two ordering lists (3 → 17). - Widgets & tiles is new: the agenda widget's own range and size, plus the Quick Settings tile. "Agenda range" no longer sits one row above "Agenda widget range" pretending to be the same setting. - Backup & restore is new: export, restore and automatic backup, lifted out of the calendar manager, which keeps a pointer row to it. Same screen logic, same either/or fallback when there's nothing exportable; it shares CalendarsViewModel and is hoisted in CalendarHost like the manager, since both are driven by the calendar list rather than by preferences. Descriptions follow one rule now: a toggle says what happens when it's on (Dynamic colour finally does), and a picker row shows its value, with the explanation in the picker itself when the value alone says nothing — the shape widget size and month style already used. Four picker descriptions added, no string keys renamed or removed, so the translations stay consistent. SettingsScreen.kt is split one file per sub-screen (2108 → 409 lines); the 2000-line single file was why this drifted in the first place. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Calendula
A modern Material 3 Expressive calendar for Android.
Reads, writes, and reminds — on top of the system calendar, with zero network access.
Calendula is named after the flower whose name — like the word calendar —
comes from the Latin kalendae, the first day of the month. It lives
entirely on top of Android's CalendarContract: any calendar synced to your
device (CalDAV via DAVx5, Google, local, WebCal subscriptions, …) simply
appears, and everything you create or edit syncs back the same way. No own
database, no sync stack reinvented.
✨ Features
Calendar
- Month, week, and day views with a one-tap view switcher
- Full event details — attendees and their responses, reminders, recurrence (humanized), availability, visibility, foreign time zones
- Per-calendar visibility toggle, grouped by account
Editing
- Create, edit, and delete events — including recurring events with scoped writes: only this event, this and all following, or the whole series
- Recurrence picker with one-tap presets and custom rules (interval, weekday toggles, end conditions); rules it can't express are preserved verbatim
- Conflict-safe saves: if an event changed elsewhere while you were editing, Calendula asks instead of silently overwriting
- Read-only calendars (WebCal, birthdays) are detected and respected
Reminders
- Event reminders delivered by Calendula itself as notifications — essential when it's your only calendar app, since Android delegates reminder delivery to calendar apps
- Tap a reminder to land on the event
Design & privacy
- Real Material 3 Expressive throughout — dynamic color (Android 12+), expressive motion and shapes, light/dark theme
- German and English UI, per-app language setting — and open to community translations
- Zero telemetry, zero analytics, no internet permission — your data never leaves the device
📦 Install
F-Droid (recommended)
Calendula is on the official F-Droid repository — just search for Calendula in any F-Droid client, or install it from f-droid.org.
Self-hosted repo (latest builds)
New versions are built, signed, and published to a self-hosted repository the moment each tag lands — usually a few days ahead of the official repo, which rebuilds on F-Droid's own schedule. Add it for the freshest builds:
-
In your F-Droid client, open Settings → Repositories → Add (or open the link below on your phone):
https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo?fingerprint=C2C0640402BF458FC0ED957AF0B37AA4C14022E72F89CE90B5965B458CF73425Repo:
https://apps.dev.jeanlucmakiola.de/dev/fdroid/repo· fingerprint (SHA-256):C2C0 6404 02BF 458F C0ED 957A F0B3 7AA4 C140 22E7 2F89 CE90 B596 5B45 8CF7 3425 -
Refresh, search for Calendula, install.
Both channels share the same signing key, so you can switch between them without reinstalling. Or build from source — see below.
📚 Documentation
- Building from source — requirements and Gradle tasks
- Architecture — the layered design and key pipelines
- Roadmap — what's shipped and what's next
🌍 Translations
Calendula ships in German and English, and you're warmly invited to add your language. Translations are managed on a self-hosted Weblate:
No coding needed — register on the Weblate server, pick (or request) a language, and translate the strings in your browser. You can also reach this link in the app from the top of Settings → App language.
📜 License
MIT — Jean-Luc Makiola, 2026