Voltyn shows how much power your Apple Silicon MacBook is using right now, in watts, right in the menu bar with a 60-second trend. Open the details window for 60s, 1h, 1d and 7d history, input/system/battery power flow, adapter capability, estimated battery health, temperature and cycle count. A medium desktop widget shows the last hour. Missing data is never shown as zero. Everything stays on your Mac. US$1.00 one-time, no subscription. macOS 14+.