Jean-Luc Makiola
a34f29bcf8
Follow-up to 30fcbfa, fixing eight issues found in review:
- Cap the agenda row list at 100. SizeMode.Exact asks Glance for one
RemoteViews per host size where SizeMode.Single produced exactly one,
roughly doubling the payload; with the range reaching
AgendaRange.MAX_CUSTOM_DAYS (365) an uncapped list could push past the
binder transaction limit and the host would show "Problem loading
widget". A trailing day header stranded by the cut is dropped.
- Loosen the height cap so it only catches genuinely squashed widgets.
It previously required ~320dp of height for LARGE, so widening a widget
without also making it unusually tall — the exact resize #51 reports —
stayed REGULAR or COMPACT and the feature was near a no-op for it.
Thresholds now work on height minus header chrome.
- Lock the event stripe to the system font scale. It is a Dp beside sp
text, so at large accessibility settings the text outgrew it and it
under-ran the row it marks.
- Route the day-header and placeholder padding through the metrics table
so vertical rhythm holds at the larger tiers, and derive the text
indent from the row constants instead of a hardcoded 19dp.
- Share the bucketing as widget/WidgetScale.kt so MonthWidget (already
SizeMode.Exact) can adopt one rule rather than growing a parallel copy.
- Anchor the type ramp to Material 3 type-scale roles per CLAUDE.md, with
the two off-scale values marked and justified inline. COMPACT is
unchanged, so a default-sized widget still looks exactly as before.
- Tie the "default size unchanged" test to the provider XML's declared
3-cell band rather than one measured 222dp point.
- Hang the metrics off an ordinal-indexed table so lookup allocates
nothing per recomposition.
Co-Authored-By: Claude Opus 4.8 (1M context) <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