Quit Caffeine: Decaf Tracker

Quit Caffeine turns a fuzzy question, how much caffeine is still in me right now, into a number you can actually see and act on.

Most people who want to cut back on coffee, energy drinks, or tea are flying blind. You know you had a lot today, but you do not know if that afternoon espresso is the reason you are staring at the ceiling at midnight. Quit Caffeine fixes that with a live chart that tracks the caffeine in your system, minute by minute, from the moment you log a drink to the moment it clears.

■ Your body's real-time caffeine curve
Log a drink with one tap and watch a half-life decay chart show exactly how much caffeine is circulating in your body right now, and how much will still be there at bedtime. No more guessing whether that 3pm coffee was a mistake.

■ Sleep guard
Set your usual bedtime and a personal sleep threshold. Quit Caffeine calculates the latest time you can safely have your last cup and warns you the moment one more drink would push your bedtime level too high. It is the single feature users say changes their evenings the most.

■ Taper at your own pace, or quit cold turkey
Not everyone wants to stop overnight. Choose a gradual weekly taper plan that steps your intake down little by little, or go straight to zero and track your zero-caffeine streak day by day. Switch between modes any time as your goals change.

■ Caffeine withdrawal timeline
Headaches, fatigue, irritability, trouble focusing, these are common when you cut back fast. Quit Caffeine walks you through what commonly happens and when: the headache peak around days one and two, the fog that follows, and the steadier energy and sleep that usually return within a couple of weeks. This is general, science-informed information with milestone check-ins, not medical advice.

■ A realistic drink database
Espresso, drip coffee, cold brew, decaf, black and green tea, energy drinks, cola, and more, each with a realistic caffeine amount per size. Add custom drinks for anything the database misses, like your local coffee shop's specific brew.

■ Private by design
There is no account, no login, and no server. Every log, every chart, and every streak lives only on your device. Nothing is uploaded, nothing is shared.

Who this is for
People who feel wired and then crash. People whose afternoon coffee is quietly wrecking their sleep. People who have tried to just drink less and lost track within a week. If you want to see cause and effect instead of guessing, Quit Caffeine gives you the data.

Common questions
Does it work for tea and energy drinks, not just coffee? Yes, the drink database covers common caffeinated beverages beyond coffee, and you can log any of them.
Will it tell me to stop completely? No, the app supports both a gradual taper and a full quit, and you choose the pace.
Is this medical advice? No. The withdrawal information is general, commonly reported experience, not a diagnosis or treatment plan. Talk to a doctor about any health concerns.
Does it need an internet connection? No, everything runs and stores locally on your device.
What happens to my data if I uninstall? Since there is no account or cloud backup, your logs stay on the device only, so back up manually if you plan to switch phones.

Quit Caffeine includes a one-time purchase that removes ads permanently and unlocks the full withdrawal timeline plus a custom taper rate you can adjust to fit your own pace. Even before you purchase anything, you already get real-time tracking, the sleep guard, and the first week of the withdrawal timeline, so you can try the core experience before deciding to upgrade.