No guilt trips. No noisy gamification.
When the candle burns out, there's no "Well done!" and no celebration. Put it out early and nothing is taken away. The flame goes out, a wisp of smoke rises, and the time it burned is saved.
If a streak starts to feel like pressure, hide it for any candle. Notifications never mention your streak.
Drift mode
Like a real candle, it burns out a little before or after the time you set, for when you'd rather let go of "exactly 25 minutes". Afterwards you'll see how long it actually burned. Turn it off when you need an exact time.