About us
Weaving code
for a brighter tomorrow.
sk5s is a Taiwan-based independent software development brand creating web applications, mobile applications, games, productivity tools, and everyday utility software — with a focus on practical software, lightweight experiences, and multilingual products. We ship apps on iOS, Android, and the web, and publish open-source code where it makes sense.
sk5s at a glance
See the full product catalog
We ship 12 products across party games, productivity & utilities, and web applications — with platforms, languages, store links, GitHub repos, and current status. Head to the Products page for the complete overview.
Open source
Where it makes sense, we publish the source. Two of our products are fully open source on GitHub, with F-Droid-compatible builds published via IzzyOnDroid.
Countdate — open source
Multilingual event countdown / count-up tracker. Source available on GitHub; F-Droid-compatible builds via IzzyOnDroid.
Weread — open source
"Read it later" bookmarking tool. Source available on GitHub; F-Droid-compatible builds via IzzyOnDroid.
F-Droid distribution
Select apps are distributed through IzzyOnDroid so users who prefer FOSS-only app stores can install them.
Find all our apps
Official developer pages
Open-source repositories for sk5s products, including Countdate and Weread.
↗ github.com/sk5s
All Android apps by sk5s.
↗ Developer page
All iOS apps by sk5s.
↗ Developer page
F-Droid-compatible builds.
↗ Author page
Where we publish
Brand, blog & platform
Official homepage and English-language brand blog. Product announcements, brand updates, and service documentation.
↗ sk5s.com
Taiwan-focused marketing and first-hand product review blog (Traditional Chinese).
↗ twapp.sk5s.com
Engineering and development blog. Technical insights and lessons learned from building sk5s products.
↗ wowcode.sk5s.com
Multilingual product news, release notes, and in-app announcements.
↗ messages.sk5s.com
Official email newsletter. Product news and updates to subscribers.
↗ newsletter.sk5s.com/subscription/form
Real-time service availability and uptime monitoring across sk5s services.
↗ status.sk5s.com
Optional channels
Find us on social media
Contact us
You can use social media platform to chat with us.
You can reach us by E-mail:
↗ service@sk5s.com