# ReadyBy Planner vs Prep Clock

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.

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.

## The numbers

| Metric | ReadyBy Planner | Prep Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 16 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [AAMIR ALI NASIR](https://appshunter.io/developer/1869873698) | [Ryan Tinklepaugh](https://appshunter.io/developer/1883444651) |

## What reviewers say

### ReadyBy Planner

[App page](https://appshunter.io/ios/app/readyby-planner-never-be-late/id6757949495)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReadyBy Premium | $5.99 | per month |
| ReadyBy Premium | $34.99 | per year |


### Prep Clock

[App page](https://appshunter.io/ios/app/prep-clock-backward-timer/id6760279596)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Annual | $19.99 | per year |


## Frequently asked questions

### Is ReadyBy Planner free?

ReadyBy Planner is free to download, with in-app purchases available.

### Is Prep Clock free?

Prep Clock is free to download, with in-app purchases available.

### Do ReadyBy Planner or Prep Clock have ads?

Neither ReadyBy Planner nor Prep Clock shows ads.

### Which is updated more often, ReadyBy Planner or Prep Clock?

ReadyBy Planner ships an update every 2 weeks, and Prep Clock every 4 days. Most recently, ReadyBy Planner was updated on July 9, 2026 and Prep Clock on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*