Comparison

Yoodoo vs PrepFlex

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Yoodoo

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
Read full description

GET THE ULTIMATE ALL-IN-ONE DAILY PLANNING TOOL LOVED BY 100K+ ADHD'ERS! No more staring at the list. No more paralysis. Yoodoo turns your ADHD brain dump into a time-blocked plan in seconds - and tells you exactly what to do next. When things fall apart (and they will), one tap reschedules your whole day. No guilt. No starting over. Just: what do I do now? Answered. 100,000+ people use Yoodoo because it's the only planner built for the moment your brain freezes. - BUILT BY SOMEONE WHO REFUSED TO ACCEPT IT - I'm Ross. I built Yoodoo before I knew I had ADHD. When I got diagnosed at 39, I was annoyed, not relieved. The internet told me what I couldn't do. I'd already done it anyway. I'd tried every planner. Nothing worked long-term. Everything either overwhelmed me or made me feel worse when I fell behind. So I built the one I needed. Yoodoo is now one of the most complete ADHD planning systems available. Built for the hardest case, works for any brain. - HOW YOODOO REMOVES THE DECISION- - Brain dump everything - don't think, just capture - Tap InstaPlan - your whole day is time-blocked in seconds (PRO) - Start the task - built-in focus timer locks you in - Fell behind? One tap reschedules everything - no panic, no rewriting - Not sure what's next? Yoodoo tells you - Build routines that run on autopilot - Track habits and streaks without the shame spiral - Share your plan for built-in accountability - Widgets and reminders keep your next task visible - FREE FOREVER - - Visual time-blocking timeline - Smart to-do lists - Focus timer - Daily and weekly routines - Auto-reschedule for missed tasks - Next-task suggestions - Habit tracker with streaks - Reminders - YOODOO PRO - More structure. Less deciding. More doing. - InstaPlan - schedule your whole day from any list, instantly - AI task breakdown for executive function support - 2-way calendar sync (Google, iCal, Outlook) - App blocking during focus sessions - Unlimited lists, habits, routines and backups - Custom themes and early access to new features - Custom Widgets - BUILT FOR ADHD. WORKS FOR ANY BRAIN - You don't need a diagnosis. You just need a system that works when your brain won't cooperate. Yoodoo helps if you deal with: - ADHD or executive dysfunction - The paralysis of not knowing where to start - Anxiety-driven overwhelm - Chronic procrastination - A busy, unpredictable schedule Used daily by students, freelancers, professionals, parents - and anyone who's ever stared at a to-do list and done absolutely nothing on it. - START YOUR FREE 7-DAY FOCUS RESET - No credit card guilt spiral. No pressure. Just a system that tells you exactly what to do next, even on the days your brain has other plans. Stop deciding. Start doing. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

PrepFlex

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
Read full description

Most study apps try to plan out everything. PrepFlex doesn't. Tell us how much time you've got, even if it's just 20 minutes between classes, and what you need to cover. PrepFlex figures out what's actually worth studying in that time and builds a plan around it. Sometimes that's every topic on your list. Sometimes it's just the one or two that matter most. Either way, you'll always see exactly what made the cut and why. How it works: • Enter the time you have right now • Add what you need to study • Rate your confidence and how much each topic counts • Get a plan built for the time you actually have Get the most out of the time you have. No sign-ins, no distractions, no accounts, no ads, just a plan, built fast, for whatever time you've got. Built by a student who got tired of study apps that just don't get it.

Screenshots

Yoodoo4 screens
PrepFlex4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Yoodoo versus PrepFlex: the parameters behind the verdict, then further details
ParameterYoodooPrepFlex
PriceFreeFree
Rating3.0 (1 ratings)5.0 (5 ratings) — better
Positive reviews69.1% of reviews100.0% of reviews — better
Number of ratings15 — better
Update frequencyEvery 2 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemiumFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.615.6 — better
Further details — not scored
Size100 MB25 MB
Age rating4+4+
Developersmart recipes ltdRajat Aggarwal

Customer experience

Yoodoo

All ratings76 ratings
Positive78.9%
Neutral2.6%
Negative18.4%
Written reviews55 reviews
Positive69.1%
Neutral3.6%
Negative27.3%

PrepFlex

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

Yoodoo

Subscriptions3
  • Weekly with 3-day trial3 Days trial$3.997 Days
  • YooDoo Pro Monthly$4.991 Month
  • YooDoo Pro Yearly7 Days trial$34.991 Year
One-time2
  • Lifetime with discount$49.99
  • Lifetime$99.99
None

PrepFlex

No in-app purchases

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.

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