Guardians of the Battery

Drain rate, forecast & health

Free · In‑App Purchases

A forecast that knows your day: Guardians now learns your usual drain between visits, and new widgets show when you'll reach your low-battery mark. Your iPhone says 40 %. But 40 % of what? On a quiet morning at home that lasts all day. At the start of a long trip it might not get you home. Guardians of the Battery turns the percentage into the number you actually need: how long it will last. TIME, NOT PERCENT • Time remaining, worked out from how fast your battery really drains • Live drain rate in % per hour, measured between real percent steps so it doesn't jump around • Level, charging status, drain and forecast on one screen, with a detail view behind every card A FORECAST THAT LEARNS YOUR DAY A battery app only sees the battery while you're looking at it, which is when the screen is on and drawing the most power. So Guardians learns your usual drain from the stretches between your visits: phone in your pocket, screen off, other apps, calls. Once it has a couple of hours of those, every forecast uses your real-world rate instead of the worst case. The detail view shows both numbers and says which one it's using. ON YOUR HOME AND LOCK SCREEN Small and medium Home Screen widgets, plus circular, rectangular and inline Lock Screen widgets, show your level at a glance. With Pro they also show when you'll reach your low-battery threshold. A HEADS-UP WHEN YOU'RE LOW Pick your own threshold and get an alert when the battery drops below it. iOS lets an app check only while it's open and during occasional background refreshes, so an alert can arrive late. For a forecast you can always see, add the widget. HISTORY AND INSIGHTS • Battery level charts for the last hour, 6 hours, 24 hours and 7 days • Today's range and 24-hour trends in every detail view • Insights: unusual drain, your heaviest hours of the week, how you charge, your weekly trend and when you're likely to run low • Keep readings for 7, 14, 30 or 90 days, and clear them whenever you like GUARDIANS PRO The live numbers, the forecast, the last hour of history, the widgets and low-battery alerts are free. Pro adds: • The forecast in your widgets • Full history: 6 hours, 24 hours and 7 days • 24-hour trends in every detail view • Battery Insights Start a 14-day free trial, free via the App Store, no credit card required. After that, Lifetime Access is one purchase: pay once, all future Pro features included forever. No subscription. PRIVATE BY DESIGN Every reading stays on your device. No account, no analytics, no tracking, no servers. WHAT IT ISN'T Guardians doesn't extend your battery life, switch on power-saving modes or close apps. It's a dashboard, not a tuner: it tells you what your battery is doing so you can decide what to do about it. iOS doesn't share per-app battery use with apps; you'll find that in Settings › Battery.

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A more realistic forecast, and widgets. NEW • Widgets for the Home Screen and Lock Screen: your level at a glance and, with Pro, when you'll reach your low-battery threshold • The forecast now learns your usual drain from the time between your visits, not just the minutes the app is open, so "remaining" is much closer to real life • The live drain rate is measured between real percent steps and no longer jumps around • A redesigned overview: the gauge has its own card, and every detail view leads with its number • Clear History in Settings, to start your readings from scratch MORE FOR FREE • Every card on the overview now opens. Live values, the forecast and the last hour of history are free; Pro adds the longer history and insights ALERTS • Turning alerts on during setup now really turns them on • Plug-in and unplug alerts are gone. iOS only tells an app about those while it's open, so they could only report what you'd just done. Low-battery alerts stay, and the app now says plainly when they can arrive late ALSO • Purchases show clear loading and error states, Restore tells you when there's nothing to restore, and the privacy policy and terms are linked

Version 1.1

The developer, Ralf Koch, 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 Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer indicated that this app supports the following accessibility features. Learn More

    • Supported Features

      • Larger Text

      • Dark Interface

    Information

    Seller
    Ralf Koch
    Size
    2.5 MB
    Category
    Utilities
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    • iPad
      Requires iPadOS 18.6 or later.
    • Mac
      Requires macOS 15.6 or later.
    Languages
    English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Ralf Koch
  • Developer Website
  • Privacy Policy

    • More by Ralf Koch

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