Software · Education & science

Sticky Hours

Easily find common schedule gaps.

Completely free
Windows, macOS, Linux and Android
Open source

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Geographic availability: No geographic restriction found in our sources; availability is not checked country by country.

Technical details

Pricing: Completely freeconfirmed by Flathub
License: MIT — Open source (permissive)confirmed by Flathub
Open source: Yes
Commercial use: Yesconfirmed by Flathub
Account required: not documented
Credit card required: Noconfirmed by Flathub
Watermark: Not applicable
Ads: not documented
Platforms: Windows, macOS, Linux and AndroidEstablished by Android: Unspecified source · Linux: Flathub, Unspecified source · macOS: Unspecified source · Windows: Unspecified source
Publisher: MrStickyPiston
Latest version: 1.1.4 (9 August 2026)
Latest activity: 27 October 2026
Source code: codeberg.org/MrStickyPiston/StickyHours

At a glance

Sticky Hours is completely free: it is open source software, and every feature is available without paying or subscribing.

Its licence (MIT) is a permissive open source licence: use, modification and redistribution are allowed, including in commercial projects.

Strengths

Open source code
Commercial use allowed

About

Sticky Hours is an app designed to find common gaps in secondary school schedules. Useful for finding time to speak someone or work on a project. Do note that the app requires that your school uses Zermelo to schedule, and you need access to it. Sticky Hours is an unofficial app using the Zermelo api and not associated with Zermelo. For help with logging in, please take a look at the faq on the website. The app uses GTK for the ui, so you can apply any GTK theme to the app. To do that you will need to allow the flatpak to access the GTK themes folder. The GTK themes folder is ~/.themes for user installed themes, or xdg-config/gtk-3.0 for package installed themes. This value will be referenced as INSERT_GTK_THEMES_FOLDER later on. If you installed the flatpak system-wide, run the following command: sudo flatpak override --filesystem=INSERT_GTK_THEMES_FOLDER If installed Sticky Hours for only one user, run flatpak override --user --filesystem=INSERT_GTK_THEMES_FOLDER

Description from Flathub — AppStream (Flathub)

Sources and checks

Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) — 10 November 2026
Facts collected from Unspecified source (platforms) — 9 November 2026
Last technical check: 9 November 2026
Description from Flathub — AppStream (Flathub)

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