Social Brain Contacts vs HelixNotes

'Social Brain Contacts' is a react-native expo app that utilizes research in social brain theory to provide tools to users to group their phone contacts into bins. This app aims to help users manage and understand their social relationships better. Social Brain Theory suggests that human social networks have a layered structure where each individual has around 5 intimate relationships (e.g. romantic partners), 15 best friends, 50 good friends, 150 friends, and so on. These layers, sometimes referred to as 'Dunbar's Numbers', are thought to be cognitively constrained by the size of our brains. 'Social Brain Contacts' takes this research into account to provide users with tools to sort their contacts, helping them manage and reflect upon their social relationships.

HelixNotes is a private, open-source Markdown notes app. Your notes remain standard Markdown files under your control. No account is required, and HelixNotes has no company-operated cloud. Write with a clean visual editor or switch to source mode when you want direct access to the Markdown. Organize your work with notebooks, tags, wiki links and full-text search. Features include: • Tasks collected from checklists across your notes • List and calendar views with priorities and due dates • Wiki links and an interactive graph view • Daily notes with a built-in calendar • Markdown tables, code blocks and syntax highlighting • KaTeX mathematical notation and Mermaid diagrams • Outline navigation and tag autocomplete • Version history and automatic backups • Light, dark and customizable themes • Optional WebDAV sync with your own server • Optional AI tools using your own provider Nothing leaves your device unless you enable a feature that connects to an external service. Your notes stay readable outside HelixNotes, without a proprietary format or platform lock-in. HelixNotes is free software released under the GNU AGPLv3. Its source code is publicly available on GitLab.