Best Undecidable Apps & Games

227+ iOS apps & games curated and reviewed

4.7 avg rating
20 free apps & games
Updated May 2026

The best undecidable apps and games on iPhone average 4.7★ across 227+ titles — we've ranked them by what real users actually keep on their phones. Updated May 2026.

Compare top Undecidable Apps & Games (May 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1UndecidableUndecidableFree5.0★ (2)NoNoMay 2026
2Yuka - Food & Cosmetic ScannerYuka - Food & Cosmetic ScannerFree4.8★ (96K)NoYesJul 2026
3BeenVerified: People SearchBeenVerified: People SearchFree4.6★ (34K)YesYesJul 2026
4Think Dirty – Shop CleanThink Dirty – Shop CleanFree4.8★ (56K)YesYesJul 2026
5Sudoku.com - Number GamesSudoku.com - Number GamesFree4.8★ (1.8M)YesYesJul 2026
6Nonogram.com - Number GamesNonogram.com - Number GamesFree4.6★ (188K)YesYesJul 2026
7Ivy: Processed Food ScannerIvy: Processed Food ScannerFree4.8★ (5.5K)YesYesJul 2026
8Puzzle Page - Daily Games!Puzzle Page - Daily Games!Free4.6★ (73K)YesYesJul 2026

Top Picks for Undecidable

Undecidable#1

Undecidable by Porter Smith

AI-Powered Movie Picks
Editor's Choice
🎬 Entertainment
5.0(2 ratings)
Free
Undecidable screenshot 1
Undecidable screenshot 2

This AI-powered application helps you discover your next favorite film. It offers personalized movie suggestions to end indecision, perfect for movie nights or solo viewing.

Yuka - Food & Cosmetic Scanner#2

Yuka - Food & Cosmetic Scanner by Yuca

Check What's in Your Products
Strong Contender
💪 Health & Fitness
4.8😊(96K ratings)
FreeIn-App Purchases
#5in Health & Fitness
Yuka - Food & Cosmetic Scanner screenshot 1
Yuka - Food & Cosmetic Scanner screenshot 2
Yuka - Food & Cosmetic Scanner screenshot 3
Yuka - Food & Cosmetic Scanner screenshot 4
Yuka - Food & Cosmetic Scanner screenshot 5
Yuka - Food & Cosmetic Scanner screenshot 6

Scan product barcodes to instantly assess their health impact. Receive detailed analysis, ratings, and recommendations for healthier alternatives. This independent project offers objective reviews for millions of food and cosmetic items.

What We Love

  • 🚀 Quick and easy to use
  • 👍 Extremely informative and helpful
  • 💡 Provides healthy alternatives
  • 🔒 Independent and unbiased

Room to Improve

  • 🐛 Inconsistent ratings for same products
  • 🔍 Lacks detailed ingredient information
  • 💡 Needs better alternative recommendations
BeenVerified: People Search#3

BeenVerified: People Search by BeenVerified, Inc.

Phone, Email & Ancestry Lookup
Worth Considering
🔍 Reference
4.6😞(34K ratings)
FreeAdsIn-App Purchases
#22in Reference
BeenVerified: People Search screenshot 1
BeenVerified: People Search screenshot 2
BeenVerified: People Search screenshot 3
BeenVerified: People Search screenshot 4
BeenVerified: People Search screenshot 5
BeenVerified: People Search screenshot 6

Access public records to find phone numbers, property details, vehicle history, and more. Perform reverse phone lookups, VIN checks, and search for unclaimed money. Includes features like call blocking and dark web scans for enhanced information gathering.

What We Love

  • 🚀 Useful app for background checks
  • 🔍 Provides detailed information
  • 💡 Convenient for professional research
  • 👍 Great customer service

Room to Improve

  • 🐛 Inaccurate or outdated information
  • 🔒 Privacy concerns with personal data
  • 💰 Expensive subscription fees

More Undecidable apps to explore

4
Think Dirty – Shop Clean
Think Dirty – Shop Clean
Think Dirty – Shop Clean
Skincare & Beauty Scanner
Free

Decode beauty and skincare product labels with this app. It analyzes ingredients, provides safety ratings, and helps you find cleaner alternatives. Scan barcodes or search millions of products to make informed purchasing decisions.

Barcode scanning for product analysisIngredient safety ratingsHealth impact breakdowns
💪 Health & Fitness
(56K)
free with in-app purchases
5
Sudoku.com - Number Games
Sudoku.com - Number Games
Sudoku.com - Number Games
Classic sudoku brain puzzle
Free

Engage your mind with a classic number puzzle game. Offers thousands of puzzles for all skill levels, from beginner to expert. Features tools like hints and auto-check to aid your gameplay and track your progress.

Thousands of classic Sudoku puzzlesDaily Challenges and Seasonal EventsHints and Auto-Check features
🎮 Games
(1.8M)
free with in-app purchases
6
Nonogram.com - Number Games
Nonogram.com - Number Games
Nonogram.com - Number Games
Picture cross logic puzzle
Free

Engage in an addictive logic game featuring a vast collection of picture cross puzzles. Solve puzzles using numerical clues to reveal hidden images. Offers daily challenges, seasonal events, and tournaments for endless fun and mental stimulation.

Thousands of picture cross puzzlesDaily challenges and monthly trophiesSeasonal events with unique rewards
🎮 Games
(188K)
free with in-app purchases
7
Ivy: Processed Food Scanner
Ivy: Processed Food Scanner
Ivy: Processed Food Scanner
Uncover bad food ingredients
Free

This app helps you identify unhealthy ingredients in processed foods by scanning product barcodes. It provides detailed information on additives, seed oils, and potential allergens, allowing you to make informed dietary choices for yourself and your family.

Scan over 3 million food productsDetailed ingredient and additive informationIdentify seed oils, heavy metals, and microplastics
💪 Health & Fitness
(5.5K)
freemium
8
Puzzle Page - Daily Games!
Puzzle Page - Daily Games!
Puzzle Page - Daily Games!
Crossword, Sudoku, Nonogram
Free

Engage your mind daily with a diverse collection of word, logic, number, and picture puzzles. Access over 2,000 past puzzles, special issues, and participate in events. Offers hints and difficulty options for all skill levels.

Daily new puzzle assortmentOver 20 puzzle varietiesCalendar view for past puzzles
🎮 Games
(73K)
free with in-app purchases
9
Dust - a safer place to text
Dust - a safer place to text
Dust - a safer place to text
The ease of a text: the safety
Free

This secure messaging app offers end-to-end encryption and advanced privacy features. It allows users to unsend messages, detect screenshots, and automatically erase conversation history after 24 hours. Take control of your digital communications and protect sensitive information.

End-to-end encryptionUnsend messages anytimeScreenshot detection
💼 Business
(4.3K)
free with in-app purchases
10
Cryptogram: Word Brain Puzzle
Cryptogram: Word Brain Puzzle
Cryptogram: Word Brain Puzzle
Guess quotes in logic game!
Free

Engage your mind with a logic game that challenges you to decode secret messages and solve word puzzles. Uncover famous quotes and tackle increasingly difficult challenges in a fun, brain-exercising experience.

Decode secret messagesSolve word puzzlesUncover famous quotes
🎮 Games
(238K)
free with in-app purchases
11
Number Match - Numbers Game
Number Match - Numbers Game
Number Match - Numbers Game
Number matching puzzle games
Free

This addictive puzzle game challenges you to match pairs of numbers to clear the board. Train your logic and concentration skills with a classic pen-and-paper game brought to your mobile device. Enjoy daily challenges and seasonal events for a fun and engaging brain-teasing experience.

Match pairs of equal numbersPairs that add up to 10Connect numbers horizontally, vertically, and diagonally
🎮 Games
(237K)
free with in-app purchases
12
ID Scanner Professional
ID Scanner Professional
ID Scanner Professional
Scan IDs for Bars & Clubs
Free

This app helps businesses like bars and clubs manage visitor entry and track customer behavior. It allows for detailed analytics, history viewing, and marking specific customer profiles for easy reference.

Visitor entry trackingDetailed insight analyticsFilter and sort visitor data
💼 Business
(3.1K)
free with in-app purchases
13
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Sudoku· Classic Puzzle Games
Logic Puzzle Math Number Games
Free

This app offers a comprehensive Sudoku experience with thousands of puzzles across multiple difficulty levels. It includes features like hints, step-by-step help, customizable gameplay, and offline play. Track your progress, unlock achievements, and explore classic and modern Sudoku variations.

Unlimited Sudoku puzzlesDaily Sudoku challengesHints and step-by-step help
🎮 Games
(62K)
free with in-app purchases
14
Pocket Prep Behavioral Health
Pocket Prep Behavioral Health
Pocket Prep Behavioral Health
Pass MSW, LCSW, NCE, EPPP, BSW
Free

Prepare for behavioral health certification exams with thousands of practice questions and mock exams. Reinforce key concepts and improve retention to pass your exam confidently. Study for social work, counseling, therapy, and mental health certifications.

Thousands of practice questionsExpert-written, exam-aligned contentFull-length mock exams
📚 Education
(18K)
free with in-app purchases
15
Sudoku ▦
Sudoku ▦
Sudoku ▦
Sudoku (Soduku) Brain Puzzles
Free

Enjoy the classic paper-and-pencil puzzle game on your phone with a clean, elegant design. Challenge your mind with multiple difficulty levels and helpful tools to aid your solving experience.

Thousands of free puzzlesClassic Sudoku designPencil mode for notes
🎮 Games
(104K)
free with in-app purchases
16
Mahdoku - Zen Block Puzzle
Mahdoku - Zen Block Puzzle
Mahdoku - Zen Block Puzzle
A fusion of Mahjong and Sudoku
Free

This app blends Mahjong and Sudoku into a relaxing block puzzle experience. Place tiles on a 9x9 grid to clear rows, columns, and squares, aiming for high scores without time pressure. It offers a meditative gameplay experience designed to sharpen the mind and promote well-being.

Mahjong and Sudoku fusion9x9 grid block placementClear rows, columns, and grids
🎮 Games
(14K)
free with in-app purchases
17
Number Finder Caller ID :True
Number Finder Caller ID :True
Number Finder Caller ID :True
Spam and Lookup Protection
Free

Identify unknown callers and protect your privacy with this comprehensive reverse phone lookup tool. See who searched for your number, block spam, and manage your digital footprint. Stay safe and informed about who contacts you.

Unlimited reverse phone lookupsReal-time caller ID identificationComprehensive spam detection
🔧 Utilities
(70K)
free with in-app purchases
18
Sudoku :)
Sudoku :)
Sudoku :)
Soduku Logic Puzzle Card Game
Free

Engage your mind with this classic Japanese logic puzzle. Offers multiple difficulty levels, customizable backgrounds, and unique emoji number options. Track progress and compete with others.

Four difficulty settingsCustomizable background colorsEmoji number option
🎮 Games
(58K)
free with in-app purchases
19
Redact Privacy: Delete Tweets
Redact Privacy: Delete Tweets
Redact Privacy: Delete Tweets
Clean up Discord, Reddit, DMs
Free

Automate the secure deletion of your online content across multiple social media platforms. Easily remove posts, comments, messages, and more with smart targeting options. Take full control of your digital footprint from a single application.

Mass delete posts, comments, DMsSmart deletion by keyword/content typeSupport for multiple accounts
🔧 Utilities
(1.5K)
freemium
20
Number Crush: Match Ten Puzzle
Number Crush: Match Ten Puzzle
Number Crush: Match Ten Puzzle
by Microjoy Games Limited
Free

Engage your brain with this addictive number logic puzzle game. Match pairs of identical numbers or numbers that add up to ten to clear the board and achieve level targets. Enjoy a relaxing, no-time-limit experience with helpful props.

Match pairs of same numbersMatch pairs that add up to 10No time limit
🎮 Games
(45K)
free with in-app purchases

FAQ about Undecidable

What are the best undecidable apps & games for iPhone?
Undecidable tops our undecidable apps & games ranking as of May 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.
Yes — 20 of the top undecidable apps & games we rank are free to download, including Undecidable and Yuka - Food & Cosmetic Scanner.
Undecidable has no ads and has no in-app purchases, according to its App Store listing as of May 2026.
We track 227+ undecidable apps & games on the iOS App Store as of May 2026, ranked by rating, recency, and analysis of real user reviews.
Undecidable is an AI-powered application designed to provide personalized movie recommendations. It aims to help users easily choose their next film for movie nights or solo viewing.
Undecidable utilizes artificial intelligence to analyze user preferences and suggest movies. This process helps to end the frustration of browsing endlessly for something to watch.