Comparison

Quantum vs portablechess

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

Head to head
About

Quantum

Features
Read full description

Unlock the Mysteries of the Quantum Realm! Dive into Quantum Cat, a unique 2D puzzle platformer that blends challenging physics-based gameplay with real quantum mechanics concepts. Take control of a cat with the extraordinary ability to exist in multiple states at once! The Observer Effect In this world, being seen changes everything. Navigate through 5 handcrafted levels where "Observers" (cameras and sensors) lock your state. Use your wits to stay hidden, or manipulate their gaze to your advantage. Superposition Mechanic Stuck at a wall? Need to be in two places at once? Activate your Superposition ability! Split your reality to interact with special quantum platforms, dodge traps, and phase through obstacles. But be careful—your quantum stability is draining fast! Key Features: -Unique Quantum Gameplay: A fresh take on platforming where you control probability, not just movement. -5 Mind-Bending Levels: Progressively difficult puzzles that will test your logic and reflexes. -Stability Management: Collect Quantum Orbs to restore your coherence and aim for the perfect run. -Dynamic Physics: Precise controls and interaction with a world that reacts to your presence. -Clean & Modern Art: A polished aesthetic inspired by the strange beauty of the subatomic world. Are you ready to challenge reality? Download Quantum Cat now and find out if the cat is alive, dead, or winning!

About

portablechess

Features
Read full description

PortableChess is a clean, touch-first chess app built for real play on iPhone, iPad, and Apple Watch. Designed for small and large screens alike, the board stays front and center so moves are easy, fast, and accurate. Key features: • Full chess rules, including castling, en passant, promotion, checkmate, stalemate, threefold repetition, and 50-move draw rule. • Large, readable board layout optimized for direct touch control. • Smart legal-move highlighting and capture indicators. • Hint Mode powered by built-in analysis for practical move suggestions. • Play against AI with 4 difficulty levels, or play locally in pass-and-play style. • Undo support and SAN move history for easy review. • Multiple board themes and board orientation options. • Apple Watch focused controls, including long-press quick menu access. • Built-in opening lessons on Apple Watch based on classic game lines. PortableChess is made for fast daily games, focused practice, and comfortable chess play anywhere. No account required.

Screenshots

Quantum4 screens
portablechess4 screens

Verdict

The call

The clearest difference is device support: portablechess at 3 against Quantum's 1. Quantum's advantage is iOS requirement (17.6 vs 26.2). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 4 level
Quantum versus portablechess: the parameters behind the verdict, then further details
ParameterQuantumportablechess
PriceFreeFree
Update frequencyEvery 4 days—
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.6 — better26.2
Further details — not scored
Size1 MB10 MB
Age rating4+4+
DeveloperCelal Can SagnakINKWANG KIM

In-app purchases

None

Quantum

No in-app purchases

None

portablechess

No in-app purchases

Questions

Is Quantum free?
Quantum is free to download, with no in-app purchases.
Is portablechess free?
portablechess is free to download, with no in-app purchases.
Do Quantum or portablechess have ads?
Neither Quantum nor portablechess shows ads.

Other comparisons