ReadyBy Planner vs Prep Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ReadyBy Planner
This app helps you stop being late by calculating the exact time you need to start getting ready for any event. Simply input your deadline and tasks, and it builds a backward schedule to ensure you leave on time, every time.
- Backward planning for start times
- Exact start time calculation
- Saved routines
- Buffer time for interruptions
- Live routine tracking
- Notifications for each step
- Calendar export and sharing
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Stop being late. ReadyBy tells you exactly when to start getting ready so you can leave on time. Every time. If you’ve ever thought: “I need to leave by 8:15… when should I actually start getting ready?” ReadyBy answers that question instantly. Enter your deadline. Add what you need to do. ReadyBy builds your schedule backwards and gives you your exact start time. No guessing. No rushing. No mental time math. Just follow the plan – and leave on time. ________________________________________ WHY READYBY WORKS • Most people plan forwards and hope it works. • ReadyBy plans backwards from your deadline – because your deadline is fixed. • Your start time is what matters. • ReadyBy calculates it for you automatically, so nothing gets missed and everything gets done on time. • This is called backward planning (or reverse planning) – and it changes everything. • It’s how people naturally plan in real life. ReadyBy just makes it automatic. ________________________________________ WHO IT’S FOR → Anyone who’s always running 5–10 minutes late → People who want better time management and routines → Parents managing school runs and busy mornings → Shift workers with changing schedules → Anyone tired of rushing out the door Especially helpful for: → ADHD → Time blindness → Executive dysfunction → Dyscalculia ________________________________________ HOW IT WORKS 1. Set your deadline When do you need to be ready, leave, or arrive? 2. Add your tasks Shower, breakfast, commute – everything you need to do. 3. Get your exact start time ReadyBy calculates backwards and builds your full schedule instantly. 4. Follow along See exactly what to do and when. Stay on track in real time. ________________________________________ KEY FEATURES → Backward planning that tells you when to start → Exact start time calculation → Saved routines for daily use → Buffer time to handle real-life interruptions → Live routine tracking → Notifications for each step → Quick-add tasks → Calendar export and sharing ________________________________________ WHY READYBY IS DIFFERENT • Traditional planners tell you what to do. • ReadyBy tells you when to start. • That’s why it works. • Instead of guessing…You know exactly when to begin. • Instead of rushing…You leave calmly. • Instead of being late…You’re ready. • Never be late again. • If you’re looking for a Routinist alternative, ReadyBy is actively maintained and built for modern routines. ________________________________________ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Prep Clock
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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/
Screenshots
Verdict
The clearest difference is update cadence: Prep Clock at every 4 days against ReadyBy Planner's every 2 weeks. ReadyBy Planner'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 · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ReadyBy Planner sells 2 in-app purchases, starting at $5.99 per month and Prep Clock sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
ReadyBy Planner ships an update every 2 weeks, Prep Clock every 4 days. The most recent releases landed on July 9, 2026 and September 9, 2026 respectively.
| Parameter | ReadyBy Planner | Prep Clock |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.1 — better | 18.0 |
| Further details — not scored | ||
| Size | 47 MB | 16 MB |
| Age rating | 4+ | 4+ |
| Developer | AAMIR ALI NASIR | Ryan Tinklepaugh |
In-app purchases
ReadyBy Planner
- ReadyBy Premium$5.991 Month
- ReadyBy Premium$34.991 Year
Prep Clock
- Pro Monthly$2.991 Month
- Pro Annual$19.991 Year









