# Prep Clock: Backward Timer — Plan Backward. Leave On Time.

> Plan Backward. Leave On Time. (iPhone/iPad app by Ryan Tinklepaugh.)

- Source: https://appshunter.io/ios/app/prep-clock-backward-timer/id6760279596 (this page in markdown: same URL + `.md`)
- Developer: [Ryan Tinklepaugh](https://appshunter.io/developer/1883444651)
- Category: Productivity, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 18.0 · 16 MB
- Languages: American English
- Released: 2026-03-22
- Data updated: 2026-08-20
- User reviews in markdown: https://appshunter.io/ios/app/prep-clock-backward-timer/id6760279596/reviews.md

## What is Prep Clock?

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/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Annual | $19.99 | per year |



## Version history (last 5 releases)

### 1.0.10 — 2026-08-12

Help now opens the Prep Clock support page directly, and the legal consent screens were refreshed. Your preps, routines and history are unchanged.

### 1.0.9 — 2026-08-11

PrepClock is more reliable when plans change and time runs tight. Active prep sessions now survive cleanup, Live Activities stay available when you're late, recurring deletions stay deleted, reminders are scheduled more safely, and transit estimates and subscription access recover more gracefully.

### 1.0.8 — 2026-08-11

Know whether you'll actually make it — while you're getting ready.

• Live pace: your prep screen now shows, every second, whether you're ahead, on plan, eating into your buffer, or running late — with your projected arrival next to your planned one.
• Pause and resume without losing your place.
• Adjust a step on the fly: add or remove a minute, jump five ahead, or skip a step entirely, and watch the cost land immediately.
• See what's coming next at a glance.
• Lock Screen and Dynamic Island now carry your pace and leave-by time, so you rarely need to open the app.
• Ask Siri to start your prep, check whether you're on time, or pause.
• Setup now ends with a real first prep on your schedule instead of an empty screen.

### 1.0.7 — 2026-08-07

Recurring plans and widgets are now more reliable. Deleted occurrences stay deleted, notifications recover as capacity opens, transit commute timing works correctly, and subscriber access remains reliable across renewals.

### 1.0.6 — 2026-08-02

More dependable backward planning, clearer timing, and small refinements that make leaving on time easier.

## More apps by Ryan Tinklepaugh

- [Anchor App Blocker](https://appshunter.io/ios/app/anchor-app-blocker/id6760245776)
- [Stillpoint: 3am Reality Check](https://appshunter.io/ios/app/stillpoint-3am-reality-check/id6760322552)
- [Kept - Accountability Pacts](https://appshunter.io/ios/app/kept-accountability-pacts/id6760379382)
- [CostCurve](https://appshunter.io/ios/app/costcurve/id6761072942)
- [WellCalc](https://appshunter.io/ios/app/wellcalc/id6761081416)

All apps by Ryan Tinklepaugh: https://appshunter.io/developer/1883444651

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-20.*