Comparison

Deep Focus Timer vs MuskDayBox

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Deep Focus Timer

Features
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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 โ€ข Deep focus sessions โ€” open-ended, with gentle check-ins at your rhythm โ€ข Live Activity on the Lock Screen โ€” your sitting stays present without unlocking your phone โ€ข Brain dump to to-dos โ€” capture fast, sort into spaces later โ€ข The done list โ€” finished things stay visible; your day ends with evidence, not guilt โ€ข 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 โ€ข Weekly recap โ€” your week, mirrored back in one calm card, with one line you carry into the next โ€ข 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

About

MuskDayBox

Features
Read full description

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

Deep Focus Timer4 screens
MuskDayBox4 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences ยท 4 level
Deep Focus Timer versus MuskDayBox: the parameters behind the verdict, then further details
ParameterDeep Focus TimerMuskDayBox
PriceFreeFree
Update frequencyEvery 5 daysEvery 3 days โ€” better
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhoneiPhone, iPod โ€” better
Requires iOS17.015.5 โ€” better
Further details โ€” not scored
Size37 MB43 MB
Age rating9+4+
DeveloperMujaheth Mohammadwoobyeong jeong

In-app purchases

3 purchases

Deep Focus Timer

Subscriptions2
  • Calibrate Plus Monthly$9.991 Month
  • Calibrate Plus Yearly$39.991 Year
One-time1
  • Lifetime Access$79.99
None

MuskDayBox

No in-app purchases

Questions

Is Deep Focus Timer free?
Deep Focus Timer is free to download, with in-app purchases available.
Is MuskDayBox free?
MuskDayBox is free to download, with no in-app purchases.
Do Deep Focus Timer or MuskDayBox have ads?
Neither Deep Focus Timer nor MuskDayBox shows ads.
Which is updated more often, Deep Focus Timer or MuskDayBox?
Deep Focus Timer ships an update every 5 days, and MuskDayBox every 3 days. Most recently, Deep Focus Timer was updated on September 9, 2026 and MuskDayBox on September 11, 2026.

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