Contact Book vs Revere

Contact Book is a personal CRM for capturing contact details, logging interactions and keeping track of gifts, life events and follow-ups. Profiles can hold emails, phones, companies, addresses, birthdays, social links, food preferences, allergies and how you met someone. A shared screen brings together profiles, a relationship graph, a timeline, life events, gifts, follow-ups and a journal. Users can import and export information, export everything or delete an account through self-service settings. The service is available on the web and offers HTTP API, CLI and MCP access to the same data and access rules. The operator says its application servers and database are hosted in Germany. Public endpoints use TLS 1.3, database disks are encrypted at rest, and backups are encrypted before leaving the primary host. Daily database snapshots are retained for 30 days, stored in another physical location, and restore tests are performed quarterly. The operator says it does not sell user data or share it with advertisers. Contact Book has a free plan; Standard costs €10 per month or €100 per year. Email and calendar sync are not offered.

Revere is a notes app for remembering details about important relationships and keeping up with people. Users can save notes about conversations, gift ideas, projects or favourite drinks, then set reminders to reach out or follow up. Groups, family details, how-you-met notes, and birthday or other important-date reminders help organize those details; some features require Premium. Search is available, and the app can show phone contact details without uploading them to Revere. Notes are stored in the cloud and sync across iOS devices, including iPhone, iPad and Mac, through an account. The free plan costs $0.00 per free, has no time limit and does not cap people, notes or reminders. Premium includes in-app Face ID or Touch ID locking. AI Note Cleanup can shorten or reformat notes by sending them to Google for processing; Revere says notes are not stored or used to train AI models. Users can export data as CSV or permanently delete an account in settings. The U.S. App Store lists Premium at $4.99 per month; prices vary by country.