Herline checks in on you during every journey. If you don't respond, we alert your emergency contact — automatically.
Simple & Reliable
Three simple steps. That's all it takes to have a safety net on every journey.
Enter your destination and ETA. Choose how often you want check-ins — every 15 minutes, 30 minutes, or hourly.
Herline sends you regular check-in messages during your journey. Just press "I Am OK" to confirm you're safe and continue.
If you don't respond, a 10-minute grace period starts. If there's still no response, your emergency contact is alerted immediately.
Everything You Need
Every feature in Herline was designed with one goal: making sure someone always knows you're okay.
Choose 15-minute, 30-minute, or hourly check-ins based on your journey and comfort level.
Set a specific time for your check-in — perfect when you can't look at your phone consistently.
A buffer before alerts are sent, accounting for signal loss or moments when you're temporarily unavailable.
If you don't respond, your chosen emergency contact receives an immediate SMS from Herline on your behalf.
Tell Herline your phone is about to die. We'll pause alerts and wait for you to reconnect before escalating.
On a run? Trigger an SOS or confirm you're okay directly from your Apple Watch — no need to reach for your phone.
Free to download. Your safety sorted in minutes.
Herline is free to use. For those who want more, Herline Pro unlocks enhanced features for extra peace of mind.
Step by Step
From the moment you start a journey to the moment you arrive safely — here's exactly what happens.
Sign up with your name, email, and password. Add your emergency contact's name and phone number — this is the person Herline will alert if you don't respond. You accept our Terms & Conditions which explain how and when alerts are sent.
Takes 2 minutesBefore you set off, open Herline and start a journey. Enter where you're going, your current location, and your expected arrival time. Then choose how often you want to be checked in on — every 15 minutes, 30 minutes, or every hour.
15 sec to set upAt each scheduled interval, Herline automatically sends you a check-in notification — no action needed on your part to trigger it. When it arrives, you'll see a simple set of buttons to tap: I'm Okay, I Have Arrived, Phone About to Die / Lose Signal, Emergency SOS, or Call Emergency Contact. Just tap the one that applies. No typing, no calls — one tap and you're confirmed safe.
Automatic & one tap to confirmIf a check-in passes without a response, Herline doesn't immediately alert anyone. Instead, a 10-minute grace period begins. You'll receive a clear notification: "10 minute grace period has started." This covers signal drops, a briefly unavailable phone, or any short delay.
10 minutes of bufferIf the grace period ends with no response, your emergency contact automatically receives an SMS from Herline: "This is Herline. After the given grace period, there has been no response from [your name]. Please check in with them urgently." You also receive a notification with an emergency speed dial button.
Automatic & instantWhen you reach your destination, press I Have Arrived. You may be prompted to confirm with biometric authentication (Face ID or fingerprint) — this is optional and can be turned off in your settings. Once confirmed, Herline ends your journey and you'll have the option to send a quick reassurance message to your emergency contact letting them know you arrived safely.
One tap to endReal Messages
No typing needed — just tap a button. Here's exactly what a check-in looks like from start to finish.
Custom Option
No problem. Set a specific time for your check-in instead — like 22:10. Herline will send you one message at exactly that time asking if you're okay and if you've arrived.
Use the scroll-wheel time picker to choose exactly when you want to be checked in on — down to the minute.
Plans changed? Edit your check-in time mid-journey, or switch back to interval check-ins at any point.
The same 10-minute grace period and emergency contact alert system applies — no matter which mode you use.
Download Herline free and start your first journey today.
Help & Support
Everything you need to know about how Herline works.
No. Herline is not an emergency service and does not contact the police, ambulance, or fire services on your behalf. It alerts your nominated emergency contact via SMS. In any life-threatening situation, always call 999 immediately.
A 10-minute grace period begins. If you still don't respond, your emergency contact automatically receives an SMS from Herline asking them to check on you urgently.
Location sharing is a Herline Pro feature. If enabled, your location may be shared as a one-time snapshot with your emergency contact if you miss a grace period, your phone dies or loses signal. You can disable this at any time. Herline does not store your location history or share it with anyone else.
Yes — Herline is free to download and the core features are completely free to use. No payment is needed to set up check-ins, nominate an emergency contact, or use the SOS button. Herline Pro (£2.99/month) unlocks additional features for those who want more.
Herline Pro is our premium subscription at £2.99/month or £24.99/year. It includes up to 3 emergency contacts, Apple Watch support (SOS + I'm Okay from your wrist), and location sharing — a one-time snapshot shared with your emergency contact if you miss a grace period, your phone dies or loses signal.
Yes — Apple Watch support is available with Herline Pro. You can press I'm Okay or trigger an SOS directly from your wrist without needing to reach for your phone. Perfect for runs or exercise where your phone is nearby but not in hand.
You can let Herline know before it happens by pressing the "Phone About to Die / Lose Signal" button. This pauses alerts so your emergency contact isn't falsely alarmed. With Herline Pro, your last known location is also sent to your emergency contact automatically.
Yes — you can update your emergency contact at any time in your app settings. Make sure your contact knows they have been nominated and understands what an alert from Herline means.
When you press I Have Arrived, you may be prompted to confirm with biometric authentication (Face ID or fingerprint). This is optional and can be turned off in your settings. Once confirmed, you'll also have the option to send a reassurance message to your emergency contact letting them know you arrived safely.
Herline is for anyone who travels alone and wants peace of mind. It was built with women in mind but is available to anyone aged 18 and over. It is particularly useful for late-night commuters, solo travellers, university students, and early morning runners.
Get in touch at hello@herlineservices.com and we'll get back to you within 3 working days.
Our Story
Herline was created for anyone who has ever wished someone knew where they were.
Too many people travel alone without a safety net. Whether it's a late-night journey home, a solo trip, or simply walking back from a friend's house — there are moments when you just want someone to know you're okay.
We wanted something simpler — a quiet companion that checks in on you and only escalates when it needs to.
"Your safety should be covered by default — not something you have to remember to set up."
Herline is built around one core belief: if you don't respond, someone should know. The app handles that automatically, without drama, and without requiring anything more than a tap on a button.
Herline is for anyone who travels alone and values peace of mind. But we built it with some people particularly in mind.
What We Stand For
Every decision we make is guided by one question: does this make our users safer?
We handle sensitive personal and location data with the highest standards of privacy and care.
Safety should be accessible to everyone. Herline is and always will be free to download.
If it's complicated, people won't use it. Herline is designed to take seconds, not minutes.
Free to download. Start your first safe journey in minutes.
Get In Touch
Have a question, feedback, or want to explore a partnership? Drop us a message.
We'd love to hear from you — whether you have a question about the app, a feature suggestion, or a partnership idea.
Interested in partnering?
We're open to conversations with organisations who work in personal safety, women's welfare, or transport. Select "Partnership" in the form below.