Comparison

PhrenD vs Nuddle

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

Head to head
About

PhrenD

This app provides a self-reported screener for cognitive health, categorizing likelihood for further testing. It also offers brain exercises targeting five cognitive domains and lifestyle activities to support mental and cognitive well-being. Diet and cognition information is continuously updated.

Highlights
  • Cognitive health screener
  • Brain exercises for 5 cognitive domains
  • Lifestyle exercises for mental well-being
  • Diet and cognition information
  • Self-reported assessment
Features
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This app offers a psychometrically solid self-reported screener to give an idea of whether the person in question should seek full testing. This screener has been divided into 3 categories of likelihood based on sound data at the creation of the screener and discriminatory analyses is choosing the questions. Additionally, the app creator published a separate article examining the psychometric properties of this scale using a sample of patients that were either confirmed as normal cognition, mild cognitive impairment, or dementia after a full neuropsychological battery. In addition, this offers brain exercises specifically designed to target 5 domains of cognition, perceptual motor function, executive function, complex attention, language, learning and memory. The sixth major domain, social cognition, is better suited using the lifestyle exercises and “homework” offered in this app as well. This app offers months work of lifestyle exercises to keep the body and mind in sync. It also puts forth homework exercises that emphasize the use of cognitive faculties in both every day life, but also put in the world to encourage learning and memory as well as socialization, which is infinitely important to mental and cognitive health. These exercises can be repeated every 3-6 months, thereby, minimizing any learning or practice bias and employing creativity by both the individual, the family, and/or caretakers. Finally, and importantly, this app offers a plethora of diet and cognition information that will be continuously updated for the greater good of the public, backed by research by experts in the given disciplines. DISCLAIMER The information provided by PhrenD™ on our mobile application, if applicable] is intended for general informational and educational purposes only. All information on the PhrenD™ mobile application is provided in good faith, however the information provided is not intended to and, therefore, cannot be construed as providing medical, fitness, health, diagnostic, or similarly related advice. We make no representations or warranties of any kind, express or implied, regarding the affect, influence, or impact that use of the information provided on the Application will have on any individual. Under no circumstance shall we have any liability to you for any loss or damage of any kind incurred as a result of the use of the PhrenD™ mobile application or reliance on any information provided on the PhrenD™ mobile application. Your use of the PhrenD™ mobile application and your reliance on any information on the PhrenD™ mobile application is solely at your own risk. We encourage you to consult with the appropriate professionals or seek a doctor's advice in addition to using this app and before making any medical decisions. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Nuddle

Engage your mind with daily number sequence puzzles. Discover the underlying system to find the missing digits and build your solving streak. Enjoy unlimited random puzzles and share challenges with friends.

Highlights
  • Daily global number puzzles
  • Infinite random sequences
  • Streak building system
  • Local puzzle caching
  • Share puzzles with friends
  • Recognize number systems
Features
Read full description

Solve number sequences and daily number puzzles in short, focused brain breaks. Spot patterns in number sequences, solve the Daily Nuddle, and keep your streak alive. When you want more, jump into quick mental-math rounds, pattern sprints, memory challenges, Code Recall, and Number Matrix. Nuddle is not a traditional exam-prep app. But if you want training for MedAT or other admission tests on the go, it can help you practice faster pattern recognition, focused number work, and memory in short sessions. Each puzzle is short enough for any spare moment, but clever enough to feel satisfying when the rule clicks. No long instructions, no puzzle clutter: Nuddle shows you numbers, you find the system. What you get: - Logic: Sequences, Sequence Challenge, Number Matrix, Emoji Equations, Dice Fold - Speed: Quick Math, Pattern Sprint, Number Rush, Odd One Out, True or False, Path to Target, Gravity Shift - Memory: Target Recall, Code Recall, Count Recall, Path Recall, Match Math - Casual: Four in a Row, Tower of Hanoi, Merge, Nonogram - Admission-test training on the go - Local progress, streaks, and best scores - Light and dark design - Offline play whenever you want a quick brain break Nuddle is for anyone who likes number puzzles, logic games, mental math, patterns, and small daily challenges. Download Nuddle and find the next two numbers. Nuddle is free to download and includes the Daily Nuddle plus selected game modes at no cost. Nuddle Plus is available as an optional auto-renewable monthly or yearly subscription and unlocks all game modes while the subscription is active. Nuddle contains no ads. Payment is charged to your store account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your store account settings. You can try every locked game mode once for free before subscribing. Terms of Use (EULA): https://nuddle.schmutweiss.com/terms Privacy Policy: https://nuddle.schmutweiss.com/privacy

Screenshots

PhrenD3 screens
Nuddle4 screens

Verdict

The call

The clearest difference is price: Nuddle at Free against PhrenD's $4.99. Nuddle also leads on update cadence (weekly vs every 3 months) and rating (4.9 vs 4.5). PhrenD's advantage is iOS requirement (11.0 vs 13.0). On 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

CostPrice · In-app purchases · Ads · Monetization

Nuddle is free to download; PhrenD costs $4.99 up front. PhrenD sells 1 in-app purchase, starting at $24.99 per month and Nuddle sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Nuddle holds the better App Store score, 4.9 against 4.5. Both are backed by a comparable volume of ratings — 2 and 8 respectively.

UpkeepUpdate frequency

PhrenD ships an update every 3 months, Nuddle weekly. The most recent releases landed on September 30, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
PhrenD versus Nuddle: the parameters behind the verdict, then further details
ParameterPhrenDNuddle
Price$4.99Free — better
Rating4.5 (2 ratings)4.9 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings28 — better
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size117 MB42 MB
Age rating17+4+
DeveloperLauren FlahertySCHMUT WEISS GmbH

Customer experience

PhrenD

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Nuddle

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

1 purchases

PhrenD

Subscriptions1
  • Monthly$24.991 Month
1 purchases

Nuddle

One-time1
  • Remove ads$4.99

Questions

Is PhrenD free?
PhrenD costs $4.99, and also offers in-app purchases.
Is Nuddle free?
Nuddle is free to download, with in-app purchases available.
Which has better reviews, PhrenD or Nuddle?
Nuddle is rated higher. PhrenD averages 4.5 out of 5 from 2 ratings, while Nuddle averages 4.9 from 8 ratings.
Do PhrenD or Nuddle have ads?
Neither PhrenD nor Nuddle shows ads.
Which is updated more often, PhrenD or Nuddle?
PhrenD ships an update every 3 months, and Nuddle weekly. Most recently, PhrenD was updated on September 30, 2026 and Nuddle on October 2, 2026.

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