Comparison

Prep Clock vs Hey OnTime

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

Head to head
About

Prep Clock

Features
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Leave on time without guessing. Prep Clock starts with your arrival time, works backward through travel and preparation, and tells you exactly when to begin. PLAN THE WHOLE DEPARTURE - Build reusable routines from real prep steps. - Add destination, travel mode, buffer, and arrival time. - See start-prep, leave, and arrive times together. - Run tasks step by step with per-task timing. - Recalculate when traffic or the plan changes. - Use Running Late mode to see an honest updated arrival estimate. LEARN YOUR REAL TIMING - Record how long tasks actually take. - Compare planned and observed duration ranges. - Apply adaptive estimates to future plans. - Generate upcoming events from recurring prep plans. FREE - Up to three upcoming events and three custom routines. - Core backward planning and commute calculation. PREP CLOCK PRO - Unlimited events and routines. - Recurring plans and adaptive timing. - Calendar import and sync. - Running Late mode and additional travel modes. - Home Screen widgets and Lock Screen Live Activities. Calendar, location, and notification permissions are requested only when the related feature needs them. Schedule, task, and location details are not sent to an AI service. Subscriptions renew automatically unless canceled in your Apple ID settings. Restore an existing purchase from Settings > Restore Purchases. TERMS OF USE Product Terms of Use: https://www.uncommonweather.com/legal/apps/prepclock-terms.html Apple Standard Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Hey OnTime

Features
Read full description

Hey OnTime closes the loop your calendar app and your maps app never did. It reads the events already on your phone and makes sure you actually make them โ€” reminding you when to leave for places you drive to, and keeping after you for the meetings you just can't miss. No more padding 20 minutes into every trip "just in case." No more meetings slipping by because one quiet calendar beep went unheard. Stop guessing your commute. Stop missing meetings. Just be on time. โ€” HOW IT WORKS โ€” Connect your phone calendar โ€” iCloud, Google, or Outlook, anything synced to your device. No extra logins. Save the places you leave FROM โ€” Home, Work, "Client X." One tap. Open the Today tab. Every event with a real address shows a traffic-aware "leave by" time; every meeting without one gets a persistent reminder so it doesn't slip past you. Get a notification at exactly the right moment โ€” even if the app is closed. Enable optional email reminders as a second channel. Meet Ping, your on-time companion, guiding you along the way. โ€” WHY PEOPLE USE IT โ€” โ€ข NEVER MISS A MEETING. Reminders for meetings without a location escalate as the start time approaches โ€” a gentle heads-up, then a firmer nudge โ€” until you tap "I'm ready." Snooze if you need a few more minutes. โ€ข TRAFFIC-AWARE LEAVE TIMES. Live drive times and ETAs for events with an address, not "20 minutes on a good day." โ€ข SMART STARTING POINT. Away from home? Hey OnTime can calculate your leave-by time from where you actually are, not just your saved origin. โ€ข CALENDAR-DRIVEN. If it's on your calendar, it's in Hey OnTime. No re-entering events. โ€ข PUSH + EMAIL REMINDERS. Local push fires even when the app is closed; email backs it up. โ€ข YOUR BUFFER. Want to arrive 5 minutes early? 10? Set it once. โ€ข PRIVACY-FIRST. No ads, no selling your data, no cross-app tracking. Great for the daily commute, back-to-back meetings, client visits, school runs, appointments, and anywhere being late has a cost. โ€” GO PRO โ€” Hey OnTime is free to start. Upgrade to Pro to unlock per-event buffers and more: โ€ข Pro Monthly โ€” $4.99 / month โ€ข Pro Annual โ€” $39.99 / year (best value) Subscriptions are billed to your Apple ID at confirmation of purchase and renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store account settings. โ€” PRIVACY โ€” Your calendar stays on your device. When it's time to compute a drive time, only the destination address is sent to our server to look up live traffic. We use precise location to set your starting point and, when you enable it, to keep your leave-by times accurate from your current position as you move. No ad tracking, ever. Terms of Service: https://heyontime.com/terms/ Privacy Policy: https://heyontime.com/privacy/ โ€” SUPPORT โ€” Email: support@heyontime.com Web: https://heyontime.com

Screenshots

Prep Clock4 screens
Hey OnTime4 screens

Verdict

The call

The clearest difference is update cadence: Prep Clock at every 4 days against Hey OnTime's monthly. Hey OnTime's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases 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. Prep Clock sells 2 in-app purchases, starting at $2.99 per month and Hey OnTime sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Prep Clock ships an update every 4 days, Hey OnTime monthly. The most recent releases landed on September 9, 2026 and August 30, 2026 respectively.

Scorecard2 real differences ยท 4 level
Prep Clock versus Hey OnTime: the parameters behind the verdict, then further details
ParameterPrep ClockHey OnTime
PriceFreeFree
Update frequencyEvery 4 days โ€” betterMonthly
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 โ€” better
Further details โ€” not scored
Size16 MB47 MB
Age rating4+4+
DeveloperRyan TinklepaughWherk

In-app purchases

2 purchases

Prep Clock

Subscriptions2
  • Pro Monthly$2.991 Month
  • Pro Annual$19.991 Year
2 purchases

Hey OnTime

Subscriptions2
  • Pro Monthly$4.991 Month
  • Pro Annual$39.991 Year

Questions

Is Prep Clock free?
Prep Clock is free to download, with in-app purchases available.
Is Hey OnTime free?
Hey OnTime is free to download, with in-app purchases available.
Do Prep Clock or Hey OnTime have ads?
Neither Prep Clock nor Hey OnTime shows ads.
Which is updated more often, Prep Clock or Hey OnTime?
Prep Clock ships an update every 4 days, and Hey OnTime monthly. Most recently, Prep Clock was updated on September 9, 2026 and Hey OnTime on August 30, 2026.

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