Circa vs Evergrid

Circa is an iPhone app that logs your supplements, caffeine, and nicotine in two taps and pairs them with your Google Fitbit Air data to turn the two into trend insights, audited correlations, and a live forecast for tonight's sleep. Everything is computed on your iPhone. No Circa account is needed. Circa is free and shows advertising, which is loaded over the network. PRECISE INPUTS Log anything in two taps: exact dose, exact unit, exact time. Your stack is a shortcut, never a constraint — type any amount, switch units freely (mg, g, µg, IU, pouch, ml, drops). One-tap logging from the Lock Screen widget, or just tell Siri "Log an espresso in Circa." STIMULANT PHARMACOKINETICS Live caffeine and nicotine decay curves against your bedtime, with the 50 mg caffeine threshold drawn where it matters. See what this afternoon's espresso still costs you at 23:00. AUDITED INSIGHTS Every effect ships with its receipts: n, 95% confidence interval, p-value, correlation — and the actual nights behind it as a scatter plot. Insights that fail their interval for 14 days are retired automatically. Honest null results included. TONIGHT, FORECAST A transparent driver model predicts tonight's sleep score and deep-sleep minutes from what you actually did today. Every driver shows its signed contribution. It recomputes on every log — watch the number move. A 104-SUPPLEMENT LIBRARY Goal-ranked, evidence-graded, interaction-flagged. Pick your goals and the library re-ranks itself around you. YOUR DATA STAYS YOURS Health data is read from the Google Health API and processed entirely on-device. Disconnecting revokes access and erases everything. Export anytime as CSV and JSON. Explore the full app in demo mode before connecting anything. Circa is a personal tracking tool, not a medical device. It does not diagnose, treat, or prevent any condition. Requires a Google Fitbit Air and a Google account for live data; manual logging and demo mode work without one. Recommendations for our other apps load online. Their views and taps are counted as daily totals, without personal profiles or user/device identifiers. See our privacy policy.

Build the habits you want and quit the ones you don't — all in one calm, beautiful grid. Every day is a tile. Check in, watch the grid fill with color and your streak grow. For the things you're quitting — smoking, vaping, alcohol, weed, sugar, gambling, endless scrolling — a live clean-time counter, health milestones and an SOS button are there for the hard moments. BUILD HABITS • A year-at-a-glance grid for every habit, in 21 colors and 170+ icons — or any emoji • Daily, weekly or monthly goals, with simple check-ins or amounts (glasses, pages, minutes) • Pick the weekdays that count, check in several times a day, add a note to any day • Current streak, best streak and completion rate, always up to date QUIT WHAT HOLDS YOU BACK • A sober counter that runs to the second, from the day you stopped • Log cravings and slips without judgment: your history stays, the counter starts again • Milestones from your first day to ten years, plus health milestones for smoking, nicotine and alcohol • See the money you've saved add up, and the cigarettes you never smoked • SOS for cravings: a 15-minute timer, a guided breath, the reasons you wrote down and helplines near you • Learn your triggers: what sets off a craving, and at what time of day TASKS AND CALENDAR • To-dos next to your habits, with a due date or a start and end date, all-day or at a set time, and a reminder • Organize them in lists with their own color and icon, and check them off right from the home screen • A minimal month calendar that shows your habits and tasks for each day • Send your habits to Apple Calendar as repeating events INSIGHTS • Charts for every habit: monthly totals, best weekdays, time of day and streak history • Daily completion with a trend, perfect days, and a ranking of all your habits • Craving and slip patterns for everything you're quitting EVERYWHERE ON YOUR IPHONE • Interactive Home Screen and Lock Screen widgets, including the new Agenda — check in without opening the app • A Live Activity with your clean time on the Lock Screen and in the Dynamic Island • Control Center buttons, Siri and Shortcuts • An Apple Watch app with complications • iCloud sync across your devices SHARE YOUR PROGRESS • Story-ready cards for Instagram and more: your grid, your streak, your clean time or your monthly recap PRIVATE BY DESIGN No account, no ads, no tracking. Your data stays on your device and in your own iCloud. EVERGRID PRO The free plan includes 3 habits, 1 thing you're quitting, 1 reminder per habit, unlimited tasks with 1 list, the calendar, the grid, the SOS and sharing. Pro unlocks unlimited habits, quits and task lists, every chart, widgets, Apple Watch, the Live Activity counter, 5 reminders per habit, app icons, backup and export, and every share style. Pro is an auto-renewing subscription, monthly or yearly. The yearly plan starts with a 7-day free trial for new subscribers. Payment is charged to your Apple Account when you confirm the purchase. The subscription renews automatically unless it's cancelled at least 24 hours before the end of the current period. Manage or cancel it anytime in your App Store account settings. Evergrid is not a medical device and doesn't replace professional help. If you're struggling, please talk to a health professional or a local helpline. Terms of Use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://guilhermequinterolorenzi.com/evergrid-privacidade.html