6 ways to recruit research users: Guerrilla testing: Ask people in public - scary but free Friends & family: Quick feedback, but biased Recruitment tools: Prolific/Userbrain - fast but £ Paid ads: ££ In-product: pop ups (need dev time/tools) CRM: push, email, SMS My favourite? A mix of all

Duo’s research email hits for 3 reasons: 1) It's concise: fits into the top-of-the fold with 34 words 2) Gives an ETA & goal. Giving a sneak peak into the research 3) It's personal. The language makes it feel targeted 'as a Duolingo learner, you're an expert' What else?

New year, new pushes: 🦉 Duo keeps it simple with only 8 words in total 🧡 Headspace leans on community language like 'us', 'together' & a 'Ready, Set, Reset Challenge' 🗺️ AllTrails uses a content hook: 25 'must-see' trails of 2025 🥗 Lifesum gives an offer with an adjacent brand, saving £169