Battery Day vs BatteryMonitorComplication
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Battery Day
This app provides an at-a-glance estimate of your device's battery discharge time. It offers various widgets, gauges, and charts to visualize battery level history and predict remaining usage. The app requires active widget usage to record battery consumption.
- Battery discharge time estimation
- Variety of widgets, gauges, and charts
- Battery level history visualization
- Battery usage prediction
- Color-coded battery usage indication
- Requires active widget for data recording
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Battery Day estimates the time of your battery discharge on your iPhone, iPad and Apple Watch. Get your battery remaining time at a glance thanks to a variety of widgets, gauges and charts. Visualize your battery level history with a chart including battery level prediction and color for battery usage indication. In order for the app to record your battery usage, Battery Day must be active as a widget.
BatteryMonitorComplication
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BatteryMonitor – Battery life for your Apple Watch BatteryMonitor estimates how long your Apple Watch will last — in the app and as a watch face complication. KEY FEATURES • Smart calculation – learns from your charge and discharge cycles • Automatic measurements – every 5% battery change • Day, night, and workout drain – different discharge rates • Complication – remaining time on your watch face • Date & Weekday – shows date until threshold is reached, then remaining time. • Statistics – long-term cycles and usage overview • Measurement history – all values including discharge rates WORKOUTS & HIGH DRAIN • Adjusts the display during workouts or high activity • Workout badge on the circular complication • Optional push prompt to improve statistics HIGHLIGHTS • Accounts for recent charging • For Apple Watch Series 6–12, SE, and Ultra • Shows estimated time until battery is empty • Multiple complication sizes WHY BATTERYMONITOR? After just a few days, you get a much more useful forecast than a percentage alone — especially with the complication enabled. IMPORTANT Accuracy improves with regular use. Measurements happen in 5% steps; exact battery readings are limited by the system, so updates may feel slightly delayed. Questions or feedback? Use App Support.
Screenshots
Verdict
The clearest difference is update cadence: BatteryMonitorComplication at every 6 days against Battery Day's every 5 months. BatteryMonitorComplication also leads on price ($0.99 vs $2.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Battery Day costs $2.99 and BatteryMonitorComplication $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Battery Day ships an update every 5 months, BatteryMonitorComplication every 6 days. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.
| Parameter | Battery Day | BatteryMonitorComplication |
|---|---|---|
| Price | $2.99 | $0.99 — better |
| Rating | 4.0 (1 ratings) — better | — |
| Positive reviews | 33.3% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, Apple Watch |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Eliott Morgensztern | Michael Burch |
In-app purchases
Battery Day
No in-app purchases
BatteryMonitorComplication
No in-app purchases
Questions
Is Battery Day free?
Is BatteryMonitorComplication free?
Do Battery Day or BatteryMonitorComplication have ads?
Which is updated more often, Battery Day or BatteryMonitorComplication?
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