Train hard, type less
UnderKey helps personal trainers send motivational, personalized messages to clients worldwide — in the right language and tone.
(no credit card required)
Your clients are global. Your time isn’t.
Writing the same encouragement in five languages? Copy-pasting old check-in templates? UnderKey adapts each message to your client’s language, tone, and preferences — so you can stay focused on their results.
Multilingual motivation
Send powerful, on-brand encouragement in your client’s native language — no need to translate manually.
Client-specific tone
Some prefer tough love. Others need positivity. UnderKey tailors the message based on their preferred tone.
No typing burnout
Use quick notes or fully generated messages to check in, celebrate wins, or push for more — even on busy days.
A day in the life of a global personal trainer
From morning check-ins to late-night encouragements, UnderKey helps you connect with every client — fast, and with care.
💬 Morning check-in with Carla (Spain)
Carla prefers warm and cheerful messages in Spanish. You write a quick note in English — UnderKey helps you rewrite it in her tone and language.
📈 Progress update to David (Germany)
David wants clear, data-driven feedback. His profile is set to ‘concise, formal German’. You use Notes mode to generate the message in seconds.
🔥 Motivational nudge to Amira (UAE)
Amira hasn’t logged a workout today. UnderKey’s Generate mode creates a gentle push message — in Arabic, with her preferred tone: friendly and respectful.
Client chat simulation
See how UnderKey helps you encourage Luca in friendly Italian — no need to speak it fluently.
Conversation
Rules
Luca speaks Italian. He likes friendly and encouraging messages.
Smart notes
Let UnderKey handle the words — you focus on the results
Talk to every client like they matter (because they do) — without writing every message from scratch.
It only takes 1 minute to set up your first client profile.