ThunderVolt Pro

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Sub-80% Precision Limits

Apple's native limiter stops at 80%. ThunderVolt Pro goes all the way down — Storage Mode locks at 50% for long-term shelf storage, or dial in any custom threshold from 20% to 100%.

20–100% custom range — finer control than standard battery utilities
50% Storage Mode — purpose-built for long-term shelf storage
Sailing band / Hysteresis buffer — eliminates charge cycling
Discharge to target % while plugged in — free tier

Remote Control from iPhone & Watch

Full charge management from your wrist or phone — limits, modes, Sailing band, discharge, and live power flow. Apple's limiter is Mac-only. ThunderVolt follows you everywhere.

Set charge limit (20–100%) from iPhone or Watch
Toggle Storage Mode, Apple Mode, Smart Context remotely
Sailing Mode control — switch band preset from your wrist
Trigger discharge to target % while Mac is plugged in
Live power flow — AC watts & battery charge/drain
Heat & calibration alerts pushed to your wrist

AI Coach & Forecasting

Tracks your real health trend as −%/month, predicts your replacement date months before Apple's indicator moves a point, and proactively suggests schedule rules based on your charging patterns.

Real-time degradation rate (−%/month)
12-month health forecast & replacement quarter
Pattern detection — spots overnight charging habits automatically
Proactive scheduling suggestions — "Create Night Mode schedule?"
Weekly Health Report every Sunday — cycles saved, heat events

Smart Context — Travel Days

ThunderVolt reads your calendar. Detected a flight tomorrow? It automatically charges to 100% tonight, then drops back to your limit after you land. No other app in the world does this.

EventKit travel day detection
Auto-charges to 100% before flights & trips
Returns to limit after landing — automatically
Push notification: "Charging for your trip"

Charge Scheduler

Set rules that automatically apply a charge limit on specific days and times. "Weekdays 9–5: hold at 70%. Weekends: charge to 90%." No equivalent in standard battery utilities.

Day & time rules — any combination of days and hours
Auto-discharge when a rule activates — drops to your target before the window
Multiple rules with conflict detection
Daemon-evaluated — works even when the app is quit
Smart Routines — one-tap preset templates (Desk Worker, Night Mode, Creator Weekend, Storage)

Stop Charging on Sleep

Pause charging the moment your Mac sleeps or the lid closes. Resumes automatically on wake. Prevents phantom charging overnight at your desk.

IOKit power message monitoring
Instant pause on sleep / lid-close
Silent resume on wake

Live Power Flow

A real-time Sankey diagram shows exactly where every watt is going — AC adapter split between system load and battery charging, proportionally.

Proportional Bézier flow bands
AC adapter, system load, battery — live
Updates every hardware polling cycle

Health Intelligence

Raw hardware data from IOKit, calibration history tracking, and one-click CSV export. Everything you need to understand your battery's true condition over years, not weeks.

Cycle count, design capacity, max capacity, voltage — direct from hardware
True health % calculated from design vs actual capacity
Calibration history — last date, next recommended, overdue warning
Monthly calibration reminder notification
Export full history as CSV — timestamp, health, thermal state

Fleet Sync — All Your Macs

Monitor every Mac in your household from a single iPhone view. Private CloudKit sync — your data never leaves Apple's infrastructure.

Unlimited device monitoring
Private iCloud sync (E2E encrypted)
Per-device charge control from iPhone
Device grouping — assign Home, Work, or Personal labels

Privileged Daemon Control

ThunderVolt uses a privileged system daemon with documented SMC key access via Apple's IOKit — more capable than App Store alternatives. App Store sandboxing prevents this level of control. Advanced (Direct) Edition Only

BCLM / CH0B key writes (Apple Silicon + Intel)
Apple Notarized & Gatekeeper approved
One-time $29.99 — instant download

Why Upgrade

Why Upgrade to Pro?

ThunderVolt Pro combines advanced battery controls with features traditional battery apps don't offer.

Remote Control Anywhere

Control your Mac battery from iPhone and Apple Watch, including Adaptive Mode.

Smart Calendar Charging

Automatically top up before flights, trips, and important meetings.

AI Charging Coach

Learns your charging habits and suggests better overnight schedules.

Battery Forecasting

See 12-month health projections and estimated replacement timing.

Weekly Health Reports

Every Sunday: cycles saved, heat events, wear trends.

Fleet Sync

Organize multiple Macs into Home, Work, or Personal groups.

Background Protection

Heat Protection and Sailing Mode continue even when the app is closed.

Built for Modern macOS

Works with native battery controls through conflict-free Smart System Mode.

Simple Pricing

Start free. Upgrade anytime.

7-day free trial on all Pro plans. Cancel before it ends and you won't be charged.

Save battery wear automatically
Control charging remotely
Smarter than manual sliders
Designed for Mac power users

Free

$ 0

forever

Basic charge limits
Native mode support
Battery overview

Download Free

Monthly

$ 2.99

per month

7-day free trial included

All Pro features
7-day free trial
Cancel anytime

Start Free Trial

Best Value

Annual

$ 14.99

per year

Save vs monthly

All Pro features
Full Pro access
7-day free trial

Start Free Trial

Lifetime

$ 39.99

one-time

30-day money-back guarantee

Lifetime access
Priority support
Future Pro updates

Buy Lifetime

Compare Plans

Full Feature Comparison

Feature	Free	Monthly	Annual	Lifetime
Core
Charge Limit (50–100%)	✔	✔	✔	✔
Manual Discharge	✔	✔	✔	✔
Basic Battery Stats & Health	✔	✔	✔	✔
Live Power Flow	Basic	Full	Full	Full
Pro Charging
Sailing Mode / Hysteresis Buffer	—	✔	✔	✔
Automatic Discharge (incl. Clamshell)	—	✔	✔	✔
Heat Protection (SMC Thermal Guard)	—	✔	✔	✔
Stop Charging When Sleeping	—	✔	✔	✔
MagSafe LED Control	—	✔	✔	✔
Hardware Battery Percentage Mode	—	✔	✔	✔
Intelligence
Adaptive Mode (auto charge strategy)	—	✔	✔	✔
Quick Modes (one-tap presets)	—	✔	✔	✔
Travel Intelligence (calendar top-up)	—	✔	✔	✔
AI Coach (pattern detection & scheduling suggestions)	—	✔	✔	✔
Battery Forecasting (12-month projection)	—	✔	✔	✔
Weekly Health Reports	—	✔	✔	✔
Full Recurring Task Scheduler	—	✔	✔	✔
Smart Routines (preset schedule templates)	—	✔	✔	✔
Apple Shortcuts Integration	—	✔	✔	✔
Ecosystem
iOS & Apple Watch Remote Control	—	✔	✔	✔
Fleet Sync (Unlimited Macs)	—	✔	✔	✔
Fleet Device Grouping (Home / Work / Personal)	—	✔	✔	✔
Support
Priority Support	Basic	✔	✔	✔
7-Day Free Trial	—	✔	✔	—

Pro Benefits

What Pro unlocks

Everything you need to protect battery health — and more.

Remote Control EXCLUSIVE

Control your Mac's battery from iPhone and Apple Watch, including Adaptive Mode.

Smart Calendar EXCLUSIVE

Automatically top up before flights, trips, and important meetings.

AI Coach EXCLUSIVE

Learns your charging habits and suggests the perfect Night Mode schedules.

Battery Forecasting EXCLUSIVE

12-month battery health projection and replacement quarter estimate.

Weekly Health Reports EXCLUSIVE

Delivered every Sunday — cycles saved, heat events, and trend summary.

Fleet Sync EXCLUSIVE

Group and monitor all your Macs by Home, Work, or Personal.

Background Protection EXCLUSIVE

Heat Guard & Sailing Mode continue working even when the app is quit.

Modern macOS Ready EXCLUSIVE

Built for macOS 26.4+. Smart System Mode works with native controls — not against them.

Upgrade from manual battery limits to intelligent battery protection.

See Pricing Start Free Trial → Buy Lifetime — $39.99

Pricing in USD. Taxes may apply depending on your region. Cancel anytime.
30-day money-back guarantee on all plans. Lifetime license covers the purchased major version + one year of free updates.