# Yoodoo vs PrepFlex

The clearest difference is rating: PrepFlex at 5.0 against Yoodoo's 3.0. PrepFlex also leads on in-app purchases (none vs 5) and review sentiment (100% vs 69%). Yoodoo's advantage is update cadence (every 2 weeks vs every 10 months). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Yoodoo sells 5 in-app purchases, starting at $3.99 per 7 days. PrepFlex asks for nothing beyond the download.

PrepFlex holds the better App Store score, 5.0 against 3.0. That said, the two scores are not equally well evidenced: PrepFlex has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 69% of Yoodoo's written reviews are positive against 100% of PrepFlex's.

Yoodoo ships an update every 2 weeks, PrepFlex every 10 months. The most recent releases landed on July 24, 2026 and August 23, 2026 respectively.

## The numbers

| Metric | Yoodoo | PrepFlex |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/yoodoo-adhd-daily-planner/id1644320094/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/prepflex-study-optimizer/id6754576477/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 69.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 10 months |
| Monetization | Freemium | **Free** |
| Size | 100 MB | 25 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [smart recipes ltd](https://appshunter.io/developer/1542445097) | [Rajat Aggarwal](https://appshunter.io/developer/1849009713) |

## What reviewers say

### Yoodoo

[App page](https://appshunter.io/ios/app/yoodoo-adhd-daily-planner/id1644320094)

This app provides a flexible planning system designed for individuals who struggle with procrastination, time blindness, or distractions. It helps users organize tasks, block time, and use focus timers, with features like auto-rescheduling for missed items. The system aims to help users move from feeling scattered to structured, even without perfect discipline.

**Highlights:** Flexible task lists, Time blocking with InstaPlan, Built-in focus timer, Auto-rescheduling of missed tasks, Habit tracking, Widgets and reminders

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly with 3-day trial | $3.99 | per 7 days |
| YooDoo Pro Monthly | $4.99 | per month |
| YooDoo Pro Yearly | $34.99 | per year |
| Lifetime with discount | $49.99 | one-time |
| Lifetime | $99.99 | one-time |


### PrepFlex

[App page](https://appshunter.io/ios/app/prepflex-study-optimizer/id6754576477)

This app creates personalized study plans from your available time and topics. It helps students organize last-minute study sessions into effective, time-balanced schedules tailored to their needs. The app focuses on efficiency with no sign-ins or distractions.

**Highlights:** Create personalized study plans, Tailored to available time, Add and weight study topics, Set confidence levels for topics, Local data storage for privacy, Distraction-free study environment

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

**In-app purchases:** none


## Frequently asked questions

### Is Yoodoo free?

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

### Is PrepFlex free?

PrepFlex is free to download, with no in-app purchases.

### Which has better reviews, Yoodoo or PrepFlex?

PrepFlex is rated higher. Yoodoo averages 3.0 out of 5 from 1 ratings, while PrepFlex averages 5.0 from 5 ratings.

### Do Yoodoo or PrepFlex have ads?

Neither Yoodoo nor PrepFlex shows ads.

### Which is updated more often, Yoodoo or PrepFlex?

Yoodoo ships an update every 2 weeks, and PrepFlex every 10 months. Most recently, Yoodoo was updated on July 24, 2026 and PrepFlex on August 23, 2026.

---

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