phoneWatcher vs Battery Day
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
phoneWatcher
Receive timely alerts on your smartwatch when your phone's battery level drops below a customizable threshold. Ensure you're never caught off guard by a dead phone battery again.
- Watch notifications for low phone battery
- Customizable notification threshold
- Supports all Watch complications
- Regular phone battery checks
- Avoid dead phone surprises
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Get alerted on your Watch when your phone is low on battery. Select notification threshold according to your risk tolerance. Supports all Watch complications. Just add one to your favorite Watch Face and your phone's battery will be checked regularly. Don't get surprised by a dead phone battery again.
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.
Screenshots
Verdict
The clearest difference is price: phoneWatcher at Free against Battery Day's $2.99. phoneWatcher also leads on update cadence (every 2 weeks vs every 5 months) and review sentiment (50% vs 33%). On rating, ads, in-app purchases and device support 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
phoneWatcher is free to download; Battery Day costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.0 for phoneWatcher against 4.0 for Battery Day. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews are what separate them: 50% of phoneWatcher's written reviews are positive against 33% of Battery Day's.
phoneWatcher ships an update every 2 weeks, Battery Day every 5 months. The most recent releases landed on June 1, 2026 and September 3, 2026 respectively.
| Parameter | phoneWatcher | Battery Day |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 4.0 (4 ratings) | 4.0 (1 ratings) |
| Positive reviews | 50.0% of reviews — better | 33.3% of reviews |
| Number of ratings | 4 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Erwin Mazariegos | Eliott Morgensztern |
Customer experience
phoneWatcher
Battery Day
In-app purchases
phoneWatcher
No in-app purchases
Battery Day
No in-app purchases
Questions
Is phoneWatcher free?
Is Battery Day free?
Which has better reviews, phoneWatcher or Battery Day?
Do phoneWatcher or Battery Day have ads?
Which is updated more often, phoneWatcher or Battery Day?
Other comparisons
