Check-In App
The client check-in app for coaches your clients don't need to download
Looking for a client check-in app? The problem is your clients won't download it. NudgeCheck solves this by using WhatsApp: you manage everything from the dashboard, clients respond where they already are.
The problem coaching apps don't solve
Every coaching app asks your clients the same thing: "Download our app." And that's where the problems begin. The client downloads it to make you happy, opens it twice, then forgets about it. After a month nobody uses it. But you keep paying for the platform.
The data confirms it: app-based programs have completion rates between 5% and 15%. WhatsApp-based ones? Between 40% and 60%. The difference isn't in client motivation — it's in the friction of the medium.
Dedicated app
- Download from app store
- Create an account
- Remember the password
- Open the app (every time)
- Navigate the interface
5-15% completion
NudgeCheck (WhatsApp)
- Receive WhatsApp notification
- Open the chat (already installed)
- Reply with text or voice
- Done.
40-60% completion
What NudgeCheck does (and what others don't)
NudgeCheck isn't an all-in-one coaching app. It's built to do one thing, and do it well: structured check-ins via WhatsApp with built-in AI.
WhatsApp check-ins
Questions arrive on WhatsApp. Clients reply in the same chat. 98% open rate.
Voice notes + transcription
Clients record a voice note, AI transcribes it. You read in 10 seconds what would have taken 3 minutes.
Automatic AI summaries
Each completed check-in generates a summary with key points and risk flags. No manual data analysis.
Google Sheets sync
Responses sync in real time to your Google Sheet. Your data, where you want it.
Automatic scheduling
Daily, weekly, monthly. Set it up once, check-ins go out on their own.
GDPR compliant
Encrypted data, voice notes deleted after transcription, no third-party sharing.
NudgeCheck vs TrueCoach, Trainerize, Everfit
These platforms are good products. But they all share the same fundamental problem: they ask your clients to download an app. If your main goal is regular check-ins, here's what you get with each.
TrueCoach
~$137/mo (25 clients)Strengths
Limitations for check-ins
Trainerize
~$125/mo (25 clients)Strengths
Limitations for check-ins
Everfit
~$120/mo (25 clients)Strengths
Limitations for check-ins
NudgeCheck
Starting under €10/monthThe price comparison that matters
| Platform | Price (25 clients) | Voice AI | No download | |
|---|---|---|---|---|
| NudgeCheck | From <€10/mo | |||
| TrueCoach | ~$137/mo | |||
| Trainerize | ~$125/mo | |||
| Everfit | ~$120/mo | |||
| Spur.Fit | ~$100/mo |
Who switches to NudgeCheck
NudgeCheck isn't for everyone. It's not a workout programming or meal planning platform. It's for coaches who want one thing: regular check-ins with clients without losing their mind.
Personal trainers with 10+ clients
Under 10 clients, manual works. Above that, you need a system. NudgeCheck pays for itself from month one.
Nutritionists and dietitians
Weekly check-ins on diet adherence, weight, hydration, symptoms. All structured and synced.
Coaches with non-tech-savvy clients
If your clients won't download apps (and they won't), WhatsApp is the only way. No learning curve.
Coaches who want to save money
If you're paying $137/month for TrueCoach and only use check-ins, you're overpaying. NudgeCheck does check-ins better, at a fraction of the price.
Voice notes change everything
Many of your clients hate typing. But everyone knows how to send a voice note. With NudgeCheck, a client records a 30-second voice note on WhatsApp, and you get the AI-transcribed text. You can read 20 clients' responses during your morning coffee, instead of spending an hour re-listening to audio.
No other coaching check-in app offers this. TrueCoach, Trainerize, Everfit, Spur.Fit — none have built-in voice transcription. It's the feature coaches ask for the most, and nobody offers it. Except NudgeCheck.
Get started in 5 minutes
Sign up for free
14-day free trial, no credit card required.
Create your first form
Choose your questions: scales, multiple choice, text, voice. 2 minutes.
Add your clients
Enter name and WhatsApp number. Done.
Schedule the check-in
Pick frequency, day, and time. NudgeCheck handles the rest.
Learn more
Frequently Asked Questions
Is NudgeCheck an app clients need to download?
No. NudgeCheck is a web app for the coach. Clients reply directly on WhatsApp — they don't need to download anything, create accounts, or remember passwords. That's the fundamental difference from platforms like TrueCoach, Trainerize, or Everfit.
How does NudgeCheck compare to TrueCoach?
TrueCoach costs around $137/month for 25 clients and requires clients to download an app. NudgeCheck starts under €10/month, works on WhatsApp (98% open rate), and includes AI voice transcription and automatic summaries. Features TrueCoach doesn't offer.
Can I use NudgeCheck as a nutritionist?
Yes. NudgeCheck works for personal trainers, nutritionists, online coaches, athletic trainers — anyone who does regular check-ins with clients. Questions are fully customizable: weight, diet adherence, stress level, sleep quality, anything.
Is client data secure?
Yes. Data is stored in a secure database with encryption. NudgeCheck is GDPR compliant. Voice notes are processed for transcription and then deleted. We don't sell or share your clients' data.
Can I try NudgeCheck for free?
Yes. We offer a 14-day free trial with no credit card required. You can set up forms, add clients, and start sending check-ins on WhatsApp in under 5 minutes.