# How to send an alarm to someone else's phone Friends and groups · https://lfg.gm/send-an-alarm-to-someones-phone · Updated 2026-10-16 To send an alarm to someone else's phone, make the alarm in LFG Alarm and share its link with them, or add them by username or email. When they tap and join, their phone rings with yours at the moment you set, with the sound and picture you picked. LFG Alarm is a social alarm clock for iPhone and Android, and it works for one person or a whole group. ## Why you cannot just set an alarm on their phone Phones do not let one person set an alarm on another person's phone, for good reason: nobody wants a stranger's 4am alarm. The way around it is consent. They join your alarm once, and from then on it rings them, every time it goes off. If it is a repeating alarm, that one tap covers every Monday from now on. ## How to do it 1. **Make the alarm** in LFG Alarm: a time, an event from a Partiful or Luma link, or a moment like a post or a price. 2. **Share it** with **Make it social** on: pick the friend by username, type their email, or choose **Anyone with the link rides**. See [Sharing and reach](https://lfg.gm/wiki/sharing-and-reach). 3. **Send them the link**, `lfg.gm/a/`, by text, WhatsApp, iMessage or anywhere. People you add yourself get a notification and can tap it instead. 4. **They tap it and join.** Now it rings on both phones, in the same second. See [Riding an alarm](https://lfg.gm/wiki/riding-an-alarm). ## Who people actually send alarms to **The friend with the 6am flight.** Leah is flying to Lisbon at 8:05 and has slept through a flight before. Her friend Tariq makes a one-off alarm for 5:15 called "Lisbon, leave by 5:45" with a siren and the Drill sergeant voice, and sends her the link the night before. At 5:15 both phones ring. At 5:17 Tariq checks the [wake board](https://lfg.gm/wiki/wake-board): she tapped I'm up in eight seconds. He goes back to sleep. **The partner who needs to leave work on time.** Not a wake-up at all: a one-off alarm at 2:50 called "Pickup, gate at 3:10" that rings in the middle of a meeting. See [a heads-up your partner can't miss](https://lfg.gm/partner-heads-up). **Forty guests.** A host does not want to call 40 people on the night. One alarm, one link in the invite, and everyone who joined is rung two hours before. See [how to get people to show up to events](https://lfg.gm/how-to-get-people-to-show-up-to-events). ## A better way than calling everyone Calling takes time, a surprise call at 5am is alarming in the wrong way, and a missed call is just a red badge. An alarm they joined is expected, rings even when chats are muted, and can be fun: a hype video, a song, Rocco roasting a snooze. ## How loud it is on their phone Time and event alarms are real alarms on both phones: on iPhone they use Apple's own alarm system and ring through silent mode and Focus; on Android they take over the screen even when the phone is locked. Alarms for moments (a post, a price, a wallet, a webhook) ring full screen on Android, even on Do Not Disturb; on iPhone they arrive as a time-sensitive alert with the alarm's own sound, which respects the silent switch, so the person needs the ringer on. ## Wake a friend who sleeps through calls Pick a loud sound or a shouting voice, and the wake board shows whether they got up. Their chaos level, from mild to feral, is their own setting: it decides how hard Rocco roasts their snooze. Snooze is personal too: each person sets theirs for 5, 10, 15, 30 or 60 minutes, 3 times, 10 times or forever, and the board counts every one. See [the alarm for heavy sleepers](https://lfg.gm/alarm-for-heavy-sleepers). **Try this.** Paste it into ChatGPT, Claude, Grok or another AI agent that has the LFG Alarm connector (https://mcp.lfg.gm), not into the LFG Alarm app. The person needs the LFG Alarm app on their phone. > Use LFG Alarm to set a one-off alarm for 5:15am tomorrow called "Lisbon, leave by 5:45", make it a friends alarm, add my friend [their LFG Alarm username], and give me the link to text them. Why it works: One sentence, and once your friend taps the link to join, their phone rings with yours. ## Common mistakes - **Sending the link at 4am.** They need to join before it rings. Send it the evening before. - **Choosing the sound after they join.** Once a second person rides it, the sound and picture are sealed. Pick them first. - **Expecting it to work in a phone browser.** Phone browsers do not ring. They need the app. ## Questions ### Can I send an alarm to someone without them knowing? No. They have to join it, once. ### Does it work between iPhone and Android? Yes. Links work across both, and on the web at lfg.gm. ### Do they need to be my friend in the app? No. Add them by email or send the link. ### Is it free? The app is free to download, and riding someone's alarm is free. See also [What is a social alarm clock?](https://lfg.gm/social-alarm-clock) and [the fastest way to make a group alarm](https://lfg.gm/group-alarms). ## Keep exploring - [How to make one alarm ring the whole group chat](https://lfg.gm/group-alarm-for-roommates.md): Roommates and group chats ride one alarm link, and Rocco shows who slept in. - [A shared alarm clock for couples: one alarm, two phones](https://lfg.gm/couples-alarm-clock.md): One alarm that rings both phones, with your voice or a song about them. - [Alarm app for co-parents: one alarm a day you both can't miss](https://lfg.gm/alarm-app-for-co-parents.md): One alarm a day from your co-parent or partner, for the swap, the early pickup or costume day, ringing both phones with the note and link attached. - [5am club app: one shared alarm for a club, in one city or across time zones](https://lfg.gm/5am-club-app.md): Run a 5am club, a run club or a gym group on one repeating alarm, each person woken at their own 5:00, the plan in the creator’s note and a wake board of who made it. - [The fastest way to make a group alarm with your friends](https://lfg.gm/group-alarms.md): Save your people once as a group, then one tap makes an alarm that rings every phone together. - [What is a social alarm clock?](https://lfg.gm/social-alarm-clock.md): An alarm you share by link, so every phone that joined rings together, with a wake board of who got up. ## About LFG Alarm LFG Alarm is a social alarm clock for iPhone, iPad and Android. It rings for times and for moments (a post on X, a stream going live, a token price, a wallet buying, an event starting), and one shared link makes every phone that joined ring together. Rocco, the cat inside the app, does the watching and the waking. - Get it on Google Play: https://play.google.com/store/apps/details?id=gm.lfg.app - Download on the App Store: https://apps.apple.com/app/id6821089085 - Use it from an AI agent: add the MCP server https://mcp.lfg.gm as a connector, then ask in plain words. - Every page for agents: https://lfg.gm/llms.txt