Build → journaling every day
Set a daily minimum — 10 minutes inside Day One, Journey, or any journaling app you use. Lockin reads the time via Screen Time on iOS or Digital Wellbeing on Android, hands-off. Hit your minimum and your stake returns. Miss it and your stake funds the charity you chose.
Suggested starting contract
$3/day against missing your daily target of 10 minutes per day in your journaling app.
Free download on the App Store and Google Play. Account creation takes under a minute using email or Apple/Google sign-in.
From the challenge picker, select Learning.
Tap to select every app whose active time should count: Day One, Journey, Daylio, Reflectly, Stoic, Five Minute Journal, Apple Notes, Bear, Notion, or whatever you actually use to write. Then grant the app-usage permission: approve the Screen Time prompt on iOS, or allow Lockin to read daily app usage in your phone's settings on Android. Without this permission, the contract cannot verify.
The default is 10 minutes of combined active time across the whitelisted apps per calendar day — comfortably enough for a short, honest entry. Five minutes is a legitimate starting floor if you are rebuilding the habit from zero; raise it to 15 or 20 if you want a deeper daily commitment.
By default the deadline is end-of-day — 23:59 in your local timezone — meaning your minutes only need to be logged before midnight. Tap Set deadline in the wizard to pick an earlier time on a 24-hour picker; 9:00pm is a strong default for journaling, since it forces the entry out of the pre-bed scrolling window where most missed days die. Tighter deadlines unlock higher Locks and XP rewards. The deadline is set once during contract creation and applies to every scheduled day for the life of the contract — it cannot be edited mid-contract.
The default stake is $3 per day — an amount that registers as a real loss when 11pm rolls around and the journaling app is still untouched. Choose from Lockin's vetted charity list across categories including climate, mental health, animal welfare, and digital literacy. If the OS reports less than your minimum on any day, the bulk of your stake funds that cause. Lockin charges a small platform fee to cover payment processing and operations.
Your stake is held securely by Stripe. The contract starts at midnight in your local timezone. Each day, just open Day One — or any whitelisted app — and write. The OS counts the minutes and Lockin clears the day automatically when you cross the threshold.
From Lockin's data
Research participants in Pennebaker and Beall's 1986 study who wrote about emotionally significant events visited the student health center at roughly half the rate of control participants over the six months that followed. Pennebaker and Smyth's 2016 updated review found replications across clinical populations, age groups, and cultural settings. The writing protocol in the original study was four consecutive days of 15 to 20 minutes each — a lower time investment than most daily journaling commitments. In the Lockin beta, learning-challenge contracts where users set a modest daily floor — around ten minutes of active time, enough for one substantive entry — showed stronger week-three retention than contracts with longer minimums. A floor that one short session always satisfies removes every plausible excuse, which means every miss is a genuine choice and the financial consequence lands harder.
"I had tried journaling probably six times in the last three years. Always dropped it by week two. Setting a 10-minute daily minimum on Day One fixed it. The stake mattered, but knowing the timer would catch me if I tried to half-ass a 30-second entry was the real change. Six weeks in and I have not missed a day."
— Anonymous beta user, journaling learning challenge, 6 weeks active
The research base is more robust than most habit science. James W. Pennebaker and Sandra Beall published the original controlled study in the Journal of Abnormal Psychology in 1986, finding that participants who wrote about emotionally significant events for 15 to 20 minutes a day over four days visited the health center at roughly half the rate of controls over the following six months. Pennebaker and Smyth reviewed and updated the evidence in 'Opening Up by Writing It Down' in 2016, documenting replications across clinical populations, age groups, and settings. The proposed mechanism is that writing externalizes intrusive thought and helps the brain integrate emotional experience rather than ruminate on it. The challenge is not whether journaling works — it is whether you will do it consistently enough for the effect to accumulate.
The learning challenge measures active time inside apps you whitelist on your phone — Lockin reads daily app usage through Screen Time on iPhone or Digital Wellbeing on Android. Day One, Journey, Daylio, Reflectly, Stoic, Five Minute Journal, Apple Notes, Bear, Notion, and any other app you actually use are all eligible to whitelist. Pen-and-paper journaling and voice memos do not produce app time the OS can count, so they do not satisfy the contract on their own — though many users keep handwriting or voice-memo practices alongside the digital floor.
Forfeited stakes go to a registered charity from Lockin's vetted list. You choose the charity from categories including climate, mental health, animal welfare, and digital literacy when you set up the contract. The bulk of your stake funds the charity you chose. Lockin charges a small platform fee to cover payment processing and operations. Refer to the transparency page inside the app for charity-by-charity tallies.
None of those. On iPhone, Screen Time only reports whether you crossed your daily minimum for the apps you selected — Lockin never sees screen contents, your Day One entries, your Daylio mood data, or anything you type. On Android, the app-usage permission only reveals which app you used and for how long. The pass/fail signal each day is a minutes-in-whitelisted-apps check compared against your daily target — nothing more. Your journal stays private to you.
Every contract has a per-day deadline by which your target minutes must be logged in your whitelisted apps. The default is end-of-day — 23:59 in your local timezone — so the day clears any time you cross your minimum before midnight. During the 7-step contract wizard you can tap Set deadline and pick any earlier time on a 24-hour picker — 9:00pm is a popular choice for journaling because it forces the entry to happen before the late-evening scroll window opens, and 8:00am locks the practice in before the workday absorbs you. The deadline you set applies to every scheduled day for the life of the contract. Tighter deadlines unlock higher Locks and XP rewards, since an earlier cutoff is meaningfully harder than midnight. The deadline is locked in at contract creation and cannot be edited mid-contract — that immutability is what makes it function as a precommitment rather than a movable target.
Free to download. You set the target, the stake, and the charity.