Alternatives

Products that do what Ártala – Jahrzähler does

The Germanic lunisolar calendar: source-based, as an app.

1IB
I built an open source web calendar inspired by the Google calendar▲232
I love the looks and UX of the Google calendar. But I wanted to have a version I could use more freely in my own projects, still looking similar to the one from Google.
2024 · schedule-x.dev
2
Sunsama▲1,004
If Trello & Google Calendar had a baby.
2018 · sunsama.com
3MP
Moon Phase Algorithms for C, Lua, Awk, JavaScript, etc.▲72
2025 · github.com
4
Lumoon▲38
Live 3D Moon Phase Calendar
2025
5
Dola: AI Calendar Assistant▲429
Smartly plan & sync life in seconds on your messaging app
2024
6
Lyra Chrome Extension▲179
Automated pre-meeting research in Google Calendar.
Dec 2025
7FR
French Republican Calendar based on equinoxes▲50
2022 · frcal.qt.ax
8
CalendarPipe▲155
Programmable calendar sync for humans and AI agents
Apr 2026 · calendarpipe.com
9
Weekly Calendar in Todoist▲265
Make a clear weekly plan with time-blocked tasks and events
2024
10TM
Tiny Moon – Swift library to calculate the moon phase▲106
Tiny Moon is a tiny Swift library to calculate the moon phase for any given date, works super fast, and works completely offline. All of this started when I realized that we only have 12, sometimes 13, full moon's in a year. That doesn’t seem like that many. I set out to build a MacOS app to remind me when a full moon occurs, so that I could take a moment and step outside to appreciate it. The MacOS app I ended up creating can be found at https://apps.apple.com/us/app/tiny-moon/id6502374344 along with the source code [0], all powered by the Tiny Moon library. I…
2024 · github.com
11BA
Building a 'liturgical lightbulb', bringing the Calendar to life▲109
2024 · github.com
12
LunarSight▲75
An app for Moon enthusiasts
2021
13
OI Calendar▲78
Encrypted, decentralized alternative to Google calendar
2019
14GC
Grila – Calendar for keyboard addicts, always one keypress away▲104
2023 · lowtechguys.com
15
hora Calendar▲132
Google calendar built for the Mac
Jun 2026 · horacal.app
16CD
Calendar Date Converter – For Gregorian, Lunar, Hebrew, Islamic etc.▲7
2021 · stephenweixu.github.io
17
CalenMob▲65
Calendar app with week-long view
2014
18
Lunaco — Private Calendar & Planner▲4
No server. Your day stays yours. Offline calendar & planner.
Jul 2026 · maeilapp.com
19OC
OpenSCAD configurable calendar 3D model▲55
I created a highly configurable calendar 3D model using OpenSCAD. This project uses Zeller’s Congruence to automatically adjust the calendar layout for any year. Just change the year in the configurator, and the model updates accordingly. The link contains a little more of the backstory and the downloadable model from a 3rd-party site, additionally the full source code is included in the post. Some highlights: - Implemented date calculations entirely in OpenSCAD (with no built-in date support, which was challenging but fun). - Customizable layout, multi-material printing support, and…
2025 · chrastecky.dev
20
Generador de Calendarios Lunares▲1
Crea y exporta tu calendario lunar personalizado
Feb 2026
21
Soluna Calendar▲3
Gregorian & Hijri calendar in your Mac menu bar
Jul 2026 · appsbymo.netlify.app
22NC
New Cool Calendar App for Android Just Launched▲45
2016 · venturebeat.com
23CA
Calendar API for Developers▲9
2019 · campaigndays.com
24KS
Kali – Scheduling Assistant for iOS▲27
Hey HN! Launching Kali today and I'm super excited to iterate on this. I hate scheduling and my gf got sick of managing my calendar for me, so I made an AI do it instead. :) Please let me know what you think!
2023 · apps.apple.com

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