Supported Features
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VoiceOver
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Voice Control
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Larger Text
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Dark Interface
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Differentiate Without Color Alone
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Sufficient Contrast
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Reduced Motion
Alarmist LiDAR Motion Detector
Night Vision Alarm & Camera
Free · In‑App Purchases
_Requires LiDAR sensor: iPhone 12 Pro or newer, iPad Pro (2020 or newer). Must be a Pro version._
Turn your iPhone into a motion-activated security camera. Alarmist uses your device's LiDAR sensor to detect movement, capture a photo, and log every event in a detection history that syncs across your devices through iCloud.
- Detect motion and capture evidence automatically
- Review detection history with photos on any device via iCloud
- Run silent: disable the alarm and flashlight for quiet monitoring
- Works in complete darkness using infrared depth sensing
How it works:
1. Place your device on a stable surface, aimed at the area you want to monitor
2. Configure the detection zone and sensitivity (or use defaults)
3. Arm the app
4. Keep the app in the foreground with the screen on
When motion is detected, Alarmist triggers a loud alarm (overrides Silent Mode), turns on the flashlight, and captures a photo. Or switch to silent detection: no alarm, no flash, just a photo and a log entry. Silent detection works best in lighted or dim conditions where the camera can capture a usable image.
LiDAR fires invisible infrared beams and measures depth, not pixels. A person walking through a doorway creates a large, sustained depth change that is unmistakable. This means Alarmist works in complete darkness with no visible light and no camera image required.
Every detection event is logged with a timestamp and photo. Browse your history on the device or enable iCloud sync to see it everywhere. Configurable auto-retention (30, 60, or 90 days) keeps storage in check.
Alarmist is a convenience tool, not a security system. It cannot guarantee detection of all events and should never be your sole means of protection. The device must stay plugged in for extended use, the app must remain in the foreground with the screen on, and locking the screen or switching apps stops monitoring. Technology can fail. Test in your environment and understand its limitations before relying on it. You assume all risk.
I'm a solo developer in Portland, Oregon. I built this app because I wanted it -- something I could set on a nightstand and trust to watch the door while I slept. I named it Alarmist because, well, when you're asleep in an unfamiliar room, overreacting to danger is the whole point.
perf(detection): optimize motion analysis and frame processing
perf(detection): optimize sparse motion-mask erosion
The developer, Folding Sky Co, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Purchases
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
The developer indicated that this app supports the following accessibility features. Learn More
For more information, visit the developer’s accessibility website .
Information
- Seller
- Folding Sky Co
- Size
- 14.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later.
• iPhone 6S
• iPhone 6S Plus
• iPhone SE (1st generation)
• iPhone 7
• iPhone 7 Plus
• iPhone 8
• iPhone 8 Plus
• iPhone X
• iPhone XS
• iPhone XS Max
• iPhone XR
• iPhone 11
• iPhone 11 Pro
• iPhone 11 Pro Max
• iPhone SE (2nd generation)
• iPhone 12 mini
• iPhone 12
• iPhone 12 Pro
• iPhone 12 Pro Max
• iPhone 13 Pro
• iPhone 13 Pro Max
• iPhone 13 mini
• iPhone 13
• iPhone SE (3rd generation)
• iPhone 14
• iPhone 14 Plus
• iPhone 14 Pro
• iPhone 14 Pro Max
• iPhone 15
• iPhone 15 Plus
• iPhone 15 Pro
• iPhone 15 Pro Max
• iPhone 16
• iPhone 16 Plus
• iPhone 16 Pro
• iPhone 16 Pro Max
• iPhone 16e
• iPhone 17 Pro
• iPhone 17 Pro Max
• iPhone 17
• iPhone Air
• iPhone 17e - iPad
Requires iPadOS 18.0 or later.
• iPad Pro (12.9‑inch)
• iPad Pro (12.9‑inch) Wi-Fi + Cellular
• iPad Pro (9.7‑inch)
• iPad Pro (9.7‑inch) Wi‑Fi + Cellular
• iPad (5th generation)
• iPad (5th generation) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (2nd generation)
• iPad Pro (12.9‑inch) (2nd generation) Wi‑Fi + Cellular
• iPad Pro (10.5‑inch)
• iPad Pro (10.5‑inch) Wi‑Fi + Cellular
• iPad (6th generation)
• iPad (6th generation) Wi‑Fi + Cellular
• iPad Pro (11‑inch)
• iPad Pro (11‑inch) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (3rd generation)
• iPad Pro (12.9‑inch) (3rd generation) Wi‑Fi + Cellular
• iPad mini (5th generation)
• iPad mini (5th generation) Wi‑Fi + Cellular
• iPad Air (3rd generation)
• iPad Air (3rd generation) Wi‑Fi + Cellular
• iPad (7th generation)
• iPad (7th generation) Wi‑Fi + Cellular
• iPad Pro (11‑inch) (2nd generation)
• iPad Pro (11‑inch) (2nd generation) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (4th generation)
• iPad Pro (12.9‑inch) (4th generation) Wi‑Fi + Cellular
• iPad Air (4th generation)
• iPad Air (4th generation) Wi‑Fi + Cellular
• iPad (8th generation)
• iPad (8th generation) Wi‑Fi + Cellular
• iPad Pro (11-inch) (3rd generation)
• iPad Pro (11-inch) (3rd generation) Wi‑Fi + Cellular
• iPad Pro (12.9-inch) (5th generation)
• iPad Pro (12.9-inch) (5th generation) Wi-Fi + Cellular
• iPad mini (6th generation)
• iPad mini (6th generation) Wi-Fi + Cellular
• iPad (9th generation)
• iPad (9th generation) Wi-Fi + Cellular
• iPad Air (5th generation)
• iPad Air (5th generation) Wi‑Fi + Cellular
• iPad (10th generation)
• iPad (10th generation) Wi‑Fi + Cellular
• iPad Pro (11‑inch) (4th generation)
• iPad Pro (11‑inch) (4th generation) Wi‑Fi + Cellular
• iPad Pro (12.9‑inch) (6th generation)
• iPad Pro (12.9‑inch) (6th generation) Wi‑Fi + Cellular
• iPad Air 11-inch (M2)
• iPad Air 11-inch (M2) Wi-Fi + Cellular
• iPad Air 13-inch (M2)
• iPad Air 13-inch (M2) Wi-Fi + Cellular
• iPad Pro 11-inch (M4)
• iPad Pro 11-inch (M4) Wi-Fi + Cellular
• iPad Pro 13-inch (M4)
• iPad Pro 13-inch (M4) Wi-Fi + Cellular
• iPad mini (A17 Pro)
• iPad mini (A17 Pro) Wi-Fi + Cellular
• iPad (A16)
• iPad (A16) Wi-Fi + Cellular
• iPad Air 11-inch (M3)
• iPad Air 11-inch (M3) Wi-Fi + Cellular
• iPad Air 13-inch (M3)
• iPad Air 13-inch (M3) Wi-Fi + Cellular
• iPad Pro 11-inch (M5)
• iPad Pro 11-inch (M5) Wi-Fi + Cellular
• iPad Pro 13-inch (M5)
• iPad Pro 13-inch (M5) Wi-Fi + Cellular
• iPad Air 11-inch (M4)
• iPad Air 11-inch (M4) Wi-Fi + Cellular
• iPad Air 13-inch (M4)
• iPad Air 13-inch (M4) Wi-Fi + Cellular
- iPhone
- Languages
- English and Japanese
- Age Rating
16+
- 16+
- In-App Purchases
Yes
- Alarmist Pro $19.99
- Copyright
- © 2026 Folding Sky Co
