Keep Alive vs PAIesque
Side-by-side comparison of two open source alternatives
Keep Alive
Keep Alive will send a custom message via SMS to one or more people if you haven't used your device in a given period of time. Intended to be used as a failsafe for those living alone in case of an accident or other emergency. Once the settings are configured, no further interaction is required. - 100% Device-based, no cloud services or accounts required - Free with no ads or trackers - Open Source (https://github.com/keepalivedev/KeepAlive) - Minimal Battery Usage - Multiple SMS Recipients - Custom Alert Message - Optional: Include Location Information in SMS - Optional: Place a phone call with speakerphone enabled - Optional: Send an HTTP request to a custom URL Requirements Keep Alive requires that your device has an active cellular plan. WiFi calling and messaging will be used if the device supports it. How it Works Keep Alive uses either your device's lock screen or another app(s) to detect activity. If your device hasn't been lock or unlocked for a set period of time, or if you haven't accessed the selected app(s), you will be prompted with an 'Are you there?' notification. If this notification is not acknowledged an Alert will be triggered. Based on the configured Emergency Contact Settings, one or more SMS messages and/or a phone call will be placed to notify others that you may be in need of assistance. Main Settings - Monitoring Method - Choose between using the lock screen or another app(s) to detect activity. If using another app(s), you will be prompted to select the app(s) to monitor. - Hours of Inactivity Before Prompt - how many hours since your phone was last locked or unlocked before you are prompted with an 'Are you there?' notification. Defaults to 12 hours - Minutes to Wait - if the prompt is not acknowledged within this time, an Alert will be sent based on the configured emergency contact settings. Defaults to 60 minutes - Rest Period Time Range - a range of time during which inactivity will not be counted. For example, with 'Hours of Inactivity' set at 6 hours and a Rest Period of 22:00 – 6:00, if the device is last used at 18:00, the 'Are you there?' check would not be sent until 8:00. Note that an alert can still be sent during a rest period if the 'Are you there?' check was sent BEFORE the start of a rest period. - Auto-Restart Monitoring After Alert - If enabled, monitoring will be automatically restarted after an Alert is sent. - Alert Webhook - Configure an HTTP request to be sent when an Alert is triggered Emergency Contact Settings - Phone Call Number (Optional) - when an Alert is triggered a phone call will be placed to this number with speakerphone enabled One or more SMS recipients can be configured with: - Phone Number - the phone number to send the Alert SMS to - Alert Message - the message that will be sent when an Alert is triggered - Include Location - if enabled, your location will be included in a second SMS Privacy/Data Collection No data is collected other than the configured settings. This data is not shared with the developers or any 3rd parties. The only data transmitted is to the configured emergency contacts. This app does not request network or storage access and no data is sent to the developers or any 3rd parties. Disclaimer - Not responsible for SMS or phone call charges incurred by the use of the Keep Alive app - The operation of the Keep Alive app is dependent on the device, software, and network connectivity. The developers are not responsible for any failure due to device malfunctions, software incompatibilities, or network issues.
PAIesque
PAIesque helps you to track and improve your cardiovascular health using your heart rate data. It calculates a personalized activity score and monitors your Resting Heart Rate, giving you clear, actionable insights into your fitness progress—all on your device, with no subscriptions or data sharing.Prerequisite To get started, you must first install and configure Gadgetbridge to collect heart rate data from your compatible fitness tracker or smartwatch.How It Works: PAIesque is inspired by public research from the NTNU Cardiac Exercise Research Group (CERG). Their foundational studies on the PAI (Personal Activity Intelligence) metric demonstrates a powerful finding: "Our research shows that those who achieve 100 PAI or more every week over time live on average eight years longer than others." While PAIesque does NOT use the official PAI® algorithm (that is not known anyway), it applies this same, powerful principle: Your score rises faster when your heart works harder - so long both brisk walks and vigorous workouts move you toward your goal.Key Differentiators: Open & Transparent: Unlike “black box” scores, every calculation is based on the disclosed Karvonen Heart Rate Reserve (HRR) method in combination with a simplified Training Impulse Calculation (TRIMP). You always know how your score is determined. Universal & Consistent: Use it with almost any fitness tracker supported by Gadgetbridge (Amazfit, Garmin, Xiaomi, Fitbit, 100+ devices). Your scoring method stays the same even if you change devices. Privacy-First & Local: Everything is processed on your phone. Your heart rate data never leaves your device, and no internet connection or account is required. Note: This is an independent, community-developed application. It is based on public scientific principles and foundational exercise physiology methods but is not affiliated with or endorsed by NTNU CERG, and its score is distinct from the proprietary Personal Activity Intelligence (PAI®) metric.
| Feature | Keep Alive | PAIesque |
|---|---|---|
| License | Apache-2.0 | MIT |
| Install sources | F-DroidGitHub | F-Droid |
| Categories | ProductivitySMSFitnessMessaging | ProductivityFitnessMessaging |
| Features | Ad-FreeOpen SourceNo Tracking | Ad-FreeOpen SourceNo Tracking |
| Platforms | Android | Android |
| Website | ||
| Source code |