Xcode
Google Chrome
SlackKnow what the night cost
Closed the lid at 100% and opened it at 97%? Every stretch asleep is listed with the charge it took, how often the Mac woke, and what woke it.
For MacBooks with Apple silicon · macOS 14+
Know how long your MacBook lasts and what drains it
Dotwatt replaces the battery icon in your menu bar. It measures the time left, names the apps spending the charge, and puts Low Power and an 80% charge limit one click away.
Keeps the Mac awake while Claude Code, Codex or Cursor work Early price Try free for 7 days
It is a Mac app: Try free sends the link to your Mac. One payment · 7-day refund · No account, no telemetry
Measured on the Mac, not guessed
- 15 sto the first estimate of the time left after you unplug
- +1h 39mgained by quitting one busy app, on a MacBook Pro M4 Max
- 80%a charge limit that slows battery ageing, on macOS 26.4 or later
- 13coding agents it keeps the Mac awake for, and no longer than they work
01See
It names what spends the charge. Then measures what quitting gave.
A first estimate of the time left arrives 15 seconds after you unplug and settles within two minutes. Quit a heavy app and Dotwatt measures the draw again instead of guessing.
- 16.4 W → 11.2 Wone busy app quit, on a MacBook Pro M4 Max
- +1h 39mmeasured 19 seconds later, settled in 80
02Charge
It holds the charge at 80%. And fills up once when you ask.
A battery ages fastest sitting at full. Set a limit from 80 to 100% and macOS stops charging there. Leaving for the day? One tap charges to 100% once, and the limit is back afterwards.
- 80 to 100%the limit, in steps of five, on macOS 26.4 or later
- Full onceone tap, cancelled with the same button
- Full by 8:00a time you set, once or every day: the limit lifts just early enough
03Agents
It keeps the Mac awake while your agents work. Then lets it sleep.
Start a long task and walk away. Dotwatt watches the coding agents on your Mac and holds sleep off only while one of them is busy. Five quiet minutes after the last one stops, the Mac sleeps as usual.
- Claude Code
- Codex
- Cursor
- Gemini
- Copilot
Also OpenCode, DeepSeek, Antigravity, Qwen Code, Goose, Aider, Kimi, Grok. A key you choose switches Stay awake on or off from any app.
04Modes
It switches Low, Auto and High Power in one click. Or by itself.
The energy mode sits next to the charge, not three levels deep in System Settings. Pick a level and Low Power comes on by itself below it, then off again after charging. High Power shows on the Macs that have it.
- Shortcuts actionsthe measured time left and power draw, and every switch; dotwatt:// links for Raycast or a script
- 20%or any level you choose for Low Power by itself
05Stats
It remembers, so you don't guess. What the night cost, how the battery ages, why the Mac runs hot.
See the battery age, month by month
Capacity and cycles are recorded every day, so wear is a line and not a surprise. Selling the Mac? One file holds the whole record.
Find out why it runs hot
Processor load, core temperature and fan speed, read from the Mac's own sensors. A warm Mac comes with its reason.
One tip, with its reason
Not a list of generic advice: one suggestion that fits this Mac right now, with what it gives and where the claim comes from. One tap does it.
06Compare
How it compares. Against the apps you know.
The time left, the apps spending the charge, a charge limit and staying awake for agents, in one app for one payment. Scored on 16 features, including where the others go further.
| Feature | Dotwatt | AlDente Pro | coconutBattery Plus | iStat Menus | Lungo |
|---|---|---|---|---|---|
| See | |||||
| Time left on battery | YesMeasured from the real draw | YesIn the menu bar and the dashboard | YesIn the menu bar | YesIn the menu bar | No |
| Names the apps spending the charge | YesEach app's share | YesApps above a usage threshold | No | NoTop apps by CPU, memory, disk and network | No |
| Measures what quitting an app gave | YesMeasured again after the app quits | No | No | No | No |
| Control | |||||
| Charge limit | Yes80 to 100%, on macOS 26.4 or later | YesAlso below 80%, and on macOS 12 or later | No | No | No |
| Charge to 100% once | YesOne tap, or by a set time | YesTop Up | No | No | No |
| Switches Low and High Power | YesOr Low Power by itself under a level | YesOn supported MacBooks | NoShows the mode, does not switch it | YesOn supported Macs | No |
| Keeps the Mac awake on demand | YesNo limit, a timer, or while an app runs; a shortcut key | YesSleep Control, with a timer | No | NoIts help says it does not | YesPreset durations, or until switched off |
| Awake only while coding agents work | YesRecognises 13 agents | PartlyA manual timer, no agent detection | No | No | NoNo app triggers built in |
| Record | |||||
| Battery health over time | YesMonth by month, and a report file | YesGraphs of capacity and cycles | YesSaved history; a Lifetime Analyzer | YesHealth, and graphs up to 28 days | No |
| What a night asleep cost | YesCharge lost and wakes | No | No | NoNothing is recorded during sleep | No |
| Price and fit | |||||
| One payment, no subscription | Yes | YesA lifetime licence; a yearly plan too | Yes | YesWeather data is sold separately | Yes |
| Automation from Shortcuts or scripts | YesShortcuts actions and dotwatt:// links | YesShortcuts actions | No | No | YesShortcuts, a URL scheme, a command-line tool |
| Runs on macOS 13 or earlier | NoNeeds macOS 14 and Apple silicon | YesmacOS 12 or later, most Intel MacBooks from 2013 | YesmacOS 12 or later | YesmacOS 13.5 or later | PartlyOlder versions, free, for older macOS |
| Low price for what it does | Yes$7.99 at the regular price, $0.64 a point | Partly$24.99 for a lifetime licence, $2.38 a point | Partly€12.95, €2.35 a point | Partly$11.99, $2.00 a point | Partly$4, $1.14 a point |
| Where the others go further | |||||
| iPhone and iPad battery health | No | No | YesOver USB or Wi-Fi | NoBattery levels of Bluetooth devices | No |
| CPU, memory, disk and network monitors | PartlyProcessor load, heat and fans | No | PartlySSD read and write statistics | YesAnd GPU, sensors, fan control, weather | No |
| ScoreYes counts 1, partly counts ½ | 13.5of 16 | 11of 16 | 6of 16 | 6.5of 16 | 4of 16 |
Checked on 13 November 2026 against each maker's own pages. "No" means the maker's pages do not list the feature. Low price for what it does: the one-time price divided by the score on the other rows; Yes under $1 a point, Partly up to $2.50.
Is there a free trial?
Yes. Download Dotwatt and it works in full for 7 days, with no account and no card. After that it needs a key. A purchase can still be refunded within 7 days.
Which Macs does it run on?
Macs with Apple silicon on macOS 14 or later. Intel Macs are not supported.
Does Dotwatt send my data anywhere?
There is no account and no telemetry: battery history stays in a file on your Mac. The one thing the app reports is that a key was activated, with a random id of the installation, so that a key works on three Macs and no more.
Why does the charge limit need macOS 26.4?
Dotwatt uses the charging control built into macOS, which arrived in 26.4. It switches the limit on only on macOS versions we have tested.
Why does it ask me to allow a helper?
Low Power and High Power are system settings only an administrator may change. The helper runs one system command when you flip the switch and quits 20 seconds later. Everything else works without it.
Which coding agents does it recognise?
Claude Code, Codex, Cursor, Gemini, Copilot, OpenCode, DeepSeek, Antigravity, Qwen Code, Goose, Aider, Kimi, Grok. Only the ones installed on your Mac are listed.
Can I automate it?
Yes. Dotwatt has eight actions for the Shortcuts app, dotwatt:// links for Raycast and scripts, two keyboard shortcuts that work from any app, and a full charge by a time you set. With a Shortcuts automation its actions run on a schedule. The automation page lists them all.
On how many Macs does one key work?
On up to three Macs of your own; the fourth is refused. To move the key, choose Remove the license from this Mac in Dotwatt's settings on the old Mac: that frees its place. If you no longer have that Mac, write to support. A lost key is sent again from the lost key page.
08Pricing
Pay once. The price climbs as the early places go.
One payment
Pay once and it is yours. No subscription, no renewals.
No account, no telemetry
History stays in a file on your Mac. The app reports one thing only: that a key was activated.
Native on Apple silicon
Written in Swift on the system's own APIs. It reads the battery every five seconds and stays out of your way.
One key, three Macs
Use it on up to three Macs of your own. A lost key is sent again.
Refund within 7 days
Write to support and the payment is returned.
Signed and notarized
A Developer ID app, checked by Apple. Drag it to Applications and open it.