Deep Focus Timer vs MuskDayBox
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Deep Focus Timer
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Calibrate is a deep focus timer with a simple idea: empty your head first, then sit with one thing. Start with a brain dump โ everything on your mind becomes a simple, organized to-do list. Swipe one line to begin a focus session. While you sit, Calibrate checks in quietly on your Lock Screen: still present, or did something pull you away? You answer in one tap. That's the whole mechanic. If you've outgrown the rigid 25/5 of pomodoro, this is what comes after: sessions that fit you, gentle check-ins instead of alarms, and an honest record instead of a score. Over time, the answers become something rare: an honest record of your attention. Not a score. Not a streak. A quiet mirror. WHAT'S INSIDE โข Deep focus sessions โ open-ended, with gentle check-ins at your rhythm โข Live Activity on the Lock Screen โ your sitting stays present without unlocking your phone โข Brain dump to to-dos โ capture fast, sort into spaces later โข The done list โ finished things stay visible; your day ends with evidence, not guilt โข Keeping track โ "when did I last change the filter?" Cross a to-do off, keep track of it, and the date is always there โข Weekly recap โ your week, mirrored back in one calm card, with one line you carry into the next โข No streaks, no shame, no red badges โ Calibrate helps you notice; it never judges WHO IT'S FOR People who've tried blockers and streak apps and want something gentler. Students in long study sessions. Anyone whose attention wanders โ ADHD brains welcome; the app never punishes a wandered mind, it just asks kindly. Free for 14 days, everything open โ no card needed. After that, your to-dos, journal, and history stay free forever. Calibrate Plus (focus sessions, habit intelligence, new weekly recaps) is a monthly or yearly subscription (prices shown in the App Store). Privacy policy: https://usecalibrate.app/privacy.html Terms of use: https://usecalibrate.app/terms.html
MuskDayBox
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Your todo list keeps growing, but you still don't know what to do first? MuskDayBox separates remembering from prioritizing. First write down everything for today. Then choose the three that matter most and promote them to the top. Finally, give time only to the tasks that need it. โ Your day with MuskDayBox 1. DUMP โ Write everything down No priority, no category. Just a title. As fast as they come to mind. 2. PROMOTE โ Pick the important three One tap lifts a task into FOCUS. Up to three you truly want to finish today. 3. PLAN โ Timebox only what matters Not everything goes on a schedule. Only the tasks that need focus. 4. DO โ Run your day, then it becomes a record. โ Why MuskDayBox is different ยท One field to add โ capture your day in 30 seconds, no setup. ยท Today's three โ because not everything is equally important. ยท Timeboxing is optional โ you're never forced to schedule everything. ยท No auto carry-over โ you decide what yesterday's unfinished tasks become. No todo debt. ยท One day, one sheet โ no projects, no folders. Just today. All data stays on your device. No account, no sign-in. Write all, focus on three.
Screenshots
Verdict
The clearest difference is in-app purchases: MuskDayBox at none against Deep Focus Timer's 3. MuskDayBox also leads on iOS requirement (15.5 vs 17.0). On price, update cadence, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Deep Focus Timer sells 3 in-app purchases, starting at $9.99 per month. MuskDayBox asks for nothing beyond the download.
Deep Focus Timer ships an update every 5 days, MuskDayBox every 3 days. The most recent releases landed on September 9, 2026 and September 11, 2026 respectively.
| Parameter | Deep Focus Timer | MuskDayBox |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Every 3 days โ better |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone | iPhone, iPod โ better |
| Requires iOS | 17.0 | 15.5 โ better |
| Further details โ not scored | ||
| Size | 37 MB | 43 MB |
| Age rating | 9+ | 4+ |
| Developer | Mujaheth Mohammad | woobyeong jeong |
In-app purchases
Deep Focus Timer
- Calibrate Plus Monthly$9.991 Month
- Calibrate Plus Yearly$39.991 Year
- Lifetime Access$79.99
MuskDayBox
No in-app purchases





