Phone-Only Sleep
Track Sleep Debt & Daily Energy Phone-Only
If you want a sleep tracker without a smartwatch, MaxDex estimates sleep and energy from your phone. Use it to see sleep debt and stop planning peak output on a deficit—without buying a ring.
Hardware-Free Sleep Monitoring Science
Phone-based sleep tracking uses inactivity and movement. It will not match a lab PSG or a dedicated wearable’s sensors. It will tell you, cheaply and locally, whether your nights are collapsing.
That is enough for an energy based daily planner to stop pretending every morning is equal.
Measuring Afternoon Dips via Phone Signals
Sleep debt shows up as the 2 p.m. wall. MaxDex keeps the pattern visible so you can schedule lighter work, a walk, or a recovery block instead of another failed deep-work attempt.
Aligning Tasks to Energy Scores
The point of a sleep tracking without smartwatch app is not a prettier sleep graph. It is a different Tuesday. High-friction tasks when recovered. Admin when not. Calls that respect that split.