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
Read full description

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. - Manually import selected Calendar events and attach a prep routine. No background calendar 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

A quiet calendar alert is easy to miss. Hey OnTime reads the calendars already on your iPhone and follows up as your meeting gets closer. Tap "I'm ready" to stop the follow-ups, or snooze when you need a little more time. MEETING REMINDERS THAT FOLLOW UP Keep upcoming meetings and appointments in view without entering them again. Use the calendars synced to your iPhone, including iCloud, Google and Outlook. KNOW WHEN TO LEAVE For events with a street address, see a traffic-aware departure time. Save your starting places and add a buffer to your trip. Travel times are estimates and can change with traffic. BUILT AROUND YOUR DAY See upcoming events in the Today timeline. Use follow-up reminders for meetings and departure timing for appointments you need to drive to. Hey OnTime reads your calendar without editing your events. OPTIONAL PRO SUBSCRIPTION Hey OnTime is free to download with optional Pro subscriptions for additional features. See the app's upgrade screen for the current features, local prices and subscription terms. Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel your subscription in your App Store account settings. Support: support@heyontime.com Website: https://heyontime.com Privacy Policy: https://heyontime.com/privacy/ Terms of Service: https://heyontime.com/terms/

Screenshots

Prep Clock4 screens
Hey OnTime4 screens

Verdict

The call

The clearest difference is update cadence: Prep Clock at every 5 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 5 days, Hey OnTime monthly. Both last shipped on October 11, 2026.

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 5 days โ€” betterMonthly
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS18.015.1 โ€” better
Further details โ€” not scored
Size17 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 5 days, and Hey OnTime monthly. Most recently, Prep Clock was updated on October 11, 2026 and Hey OnTime on October 11, 2026.

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