Best Undecidable Apps & Games

13+ iOS apps & games curated and reviewed

4.3 avg rating

13 free apps & games

Updated October 2026

The best undecidable apps and games on iPhone average 4.3★ across 13+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.

Compare top Undecidable Apps & Games (October 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	Undecidable	Free	5.0★ (2)	No	No	May 2026
2	Multitape Turing Machine	Free	5.0★ (1)	No	No	May 2026
3	Godel numbering	Free	—	No	No	May 2026
4	Zeronym Passport Verifier	Free	3.0★ (2)	No	No	Jul 2026
5	Vesper Tesserae	Free	—	No	Yes	Aug 2026
6	Verantyx Logic	Free	—	No	No	May 2026
7	Turing Lab	Free	—	No	No	Oct 2026
8	Eatery Match	Free	—	Yes	No	Jun 2026

Top Picks for Undecidable

Undecidable by Porter Smith

AI-Powered Movie Picks

Editor's Choice

🎬 Entertainment

5.0(2 ratings)

Free

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.

Multitape Turing Machine by Denis Mandych

Math is life!

Strong Contender

📚 Education

5.0(1 ratings)

Free

This app simulates a mathematical model of computation, allowing users to explore how abstract machines manipulate symbols on a tape according to defined rules. It's a tool for understanding the fundamental principles of computer algorithms.

Godel numbering by Sungjun Kim

Worth Considering

📚 Education

0.0(0 ratings)

Free

More Undecidable apps to explore

Zeronym Passport Verifier

Verify NFC Passports Privately

Free

Securely verify your identity using your NFC-enabled passport without sharing personal data. This app leverages zero-knowledge technology to create cryptographic proofs for authentication, ensuring your information remains private.

Zero-knowledge privacyNFC passport verificationCryptographic proofs

A ritual for the undecided

Automata Theory Learning Tool

Decizo: Can't Decide?

Beat Overthinking, Trust Gut

by LAURIN ERICH GSCHWENTER

AI生成ではない。本物のカメラで撮った証明を埋め込むアプリ

Free

📷 Photo & Video

(0)

Sudoku Clarity: Logic Puzzle

by Digital Pulse d.o.o.

Free

🎮 Games

(0)

Vocation: Career Path Finder

FAQ about Undecidable

What are the best undecidable apps & games for iPhone?

Undecidable tops our undecidable apps & games ranking as of October 2026, with a 5.0-star average from 2 App Store ratings, and it's free to download.

Are there free undecidable apps & games for iPhone?

Yes — 13 of the top undecidable apps & games we rank are free to download, including Undecidable and Multitape Turing Machine.

Does Undecidable have ads or in-app purchases?

Undecidable has no ads and has no in-app purchases, according to its App Store listing as of October 2026.

How many undecidable apps & games are on the App Store?

We track 13+ undecidable apps & games on the iOS App Store as of October 2026, ranked by rating, recency, and analysis of real user reviews.