Observed Signal · Nov 11, 2026 · Product Launch · Source: Trending Topics (DACH/CEE Innovation & Tech) · Impact: 1/5 · Sentiment: Positive
Duo Lists: Vienna Solo Developer Launches Couples App
Vienna-based solo developer Philipp Raisl has launched Duo Lists, a couples app for shared lists covering films, trips, dates, and gifts. Available for iOS and Android, the app features real-time sync, a match mode for mutually agreed picks, and a private end-to-end encrypted list. A new 'Our Year' feature is set to launch in December. The basic version is free, with Pro costing €2.99 monthly or €19.99 annually. Raisl Apps e.U., a sole proprietorship, is behind the app. The developer highlights privacy, but only the private list is end-to-end encrypted; other data is stored via Supabase in Frankfurt. The app competes with international apps like Paired and Between, as well as general-purpose tools like shared notes and shopping list apps.
The launch of a niche couples app by a solo developer is a minor consumer product release. It has low relevance to the AdTech/MarTech ecosystem, except for its mention of privacy practices and usage of third-party services.
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Key Takeaways & Evidence Grounding
- Duo Lists is a couples app for shared lists, developed by Vienna-based solo developer Philipp Raisl.
- The app is available for iPhone and Android, with a free basic version and Pro at €2.99/month or €19.99/year.
- Only the private list is end-to-end encrypted; other data is stored via Supabase in Frankfurt.
- A new 'Our Year' feature is scheduled to launch in December 2026.
- The app is published by Raisl Apps e.U., a sole proprietorship in Vienna.
Connected Companies & Entities
“Data is stored with Supabase in Frankfurt, an American company.”
“The biggest competition is everyday software: shared notes from Apple and Google.”
“The biggest competition is everyday software: shared notes from Apple and Google.”
“Shopping list apps like Bring! and SuperPlan.”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Vienna Startup Ovulyx Launches Couples-Focused Cycle Tracking App
Stefan Renzler, a Vienna-based developer, has launched Ovulyx, a cycle tracking app designed for couples, allowing both partners to view cycle phases and share an experience log to discover what helps during each phase. Users can track mood, energy, symptoms, and bleeding, with predictions for period, PMS, and fertile window. Partners connect via an invitation code and see a dedicated view with supportive actions. The app also supports trying for a baby and menopause, and allows import from Flo and MyNFP. Available on iOS, Android, and web in 29 languages across 152 countries, it offers a 30-day free trial, with Premium at €4.99 monthly or €49.99 yearly. Prioritizing privacy, data is stored in Western Europe under GDPR, and the app does not sell data or use health data for advertising. Ovulyx competes with Flo for Partners and Clue Connect.
Vienna Startup Knightify Launches Privacy-First Relationship App Pulse
Viennese software studio Knightify FlexCo has launched 'Pulse,' a privacy-centric B2C relationship application designed for couples. The app reads biometric and activity metrics—such as sleep patterns, heart rate variability, and resting heart rate—directly from Apple Health or WHOOP, translating them on-device into human-readable updates. To prioritize data privacy, raw health data is processed entirely on the user's iPhone and does not leave the device, while messaging and shared memories are encrypted via Apple's iCloud infrastructure. Pulse is currently free to use, with plans to transition to a subscription-based model. Founder Amirali Khoshneviszadeh emphasized that the application will remain completely ad-free, refusing to sell personal user data to advertisers.
Stocard Founders Launch AI-Powered Shopping List App SuperPlan
The founders behind Stocard and SuperCards have launched SuperPlan, a free shopping list app for iPhone and Android. SuperPlan combines shared lists with recipe collections, using AI to import and process recipes from social media, cookbooks, and handwritten cards into ingredient lists. The app is ad-free and requires no account, with revenue from an optional Premium subscription (€1.99/week or €29.99/year in Austria) for advanced AI features, including voice input and photo recognition. The company, Super Apps Studio GmbH, is based in Berlin and Gmunden, Austria, and was founded by David Handlos, Florian Barth, and Mark Himmelsbach. Handlos previously co-founded Stocard, which was acquired by Klarna for approximately €110 million in 2021. SuperPlan faces competition from established apps like Bring!, AnyList, and Listonic, but aims to differentiate through superior AI recognition.
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