16:8 stopped being a guess and became a number she could see
NK
Nandhini Kesavan
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Illustrative example — a written scenario showing how the tool is used, not a real customer testimonial.
Before
Nandhini had read about intermittent fasting and was “sort of doing it”. In practice her eating window drifted from nine hours to thirteen depending on the shift, and she could not tell anyone whether it was working.
What they logged
- Start and end time of every fast
- The 16-hour target against the actual hours achieved
- Energy and difficulty ratings at the end of each fast
- Weight, once a week
The moment it clicked
The completion percentages exposed the drift — her real average was 13h 40m, not 16. Fixing one thing (no snack after the 8pm shift handover) moved the average by nearly two hours.
What changed
| Measure | Before | After 10 months | |
|---|---|---|---|
| Average fast length | 13h 40m | → | 15h 50m |
| Fasts hitting the 16h target | about 20% | → | 71% |
| Weight | 74 kg | → | 67 kg |
How they keep track now
The streak and the monthly average. She treats a bad week as data, not failure — the log shows they cluster around night shifts, which she now plans for.
““Roughly sixteen hours” was actually thirteen. The gap between those two numbers was the whole problem.” — Nandhini Kesavan, Tirunelveli
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