Comparison

Escape the O vs ISUD Zero

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

Head to head
About

Escape the O

Navigate a playful maze, outsmarting "the O" by reaching the exit before it catches you. This puzzle game offers daily challenges and hundreds of mazes in various sizes, with optional hints.

Highlights
  • Outsmart "the O" AI
  • Daily competitive mazes
  • Hundreds of available mazes
  • Multiple maze sizes
  • Hint system
Read full description

Escape the O is a puzzle maze game inspired by the classic Minotaur in the Labyrinth challenge — but with a playful twist. Instead of a monster, you’re trying to outsmart Otte (“the O”), navigating through the maze to reach the exit. For every one move you make towards the exit, O gets to move twice. However, O will only move if it reduces his distance to you and will always move sideways first. Key Features: - Daily maze for you to compete against your friends - Hundreds of mazes available - 4 Maze Sizes: 9x9, 11x11, 13x13, 15x15 Hints are available, but do you need them?

About

ISUD Zero

Features
Read full description

Dodge readable bullet patterns, graze for Phase Pulse, and chase clean weekly scores against the Pattern Engine. Description: I.S.U.D. Zero is a portrait bullet-hell boss rush built around clean reads, a tiny fair hitbox, and fast retry mastery. Enter the simulation chamber, learn each boss pattern, graze close calls to charge Phase Pulse, and chase cleaner clears across The Instructor, Mirror Cadet, Twin Array, and The Cartographer. Every run is short, sharp, and score-driven. Bosses move, mutate, and escalate through multiple phases. The ship only takes damage at the red core, so the chaos stays readable even when the screen blooms with bullets. Features: - Precision drag controls for portrait play - Fair red-core hitbox with optional callout - Graze scoring and Phase Pulse screen clears - Four multi-phase bosses with distinct patterns and visual escalation - Five additional boss slots marked Coming Soon - Difficulty options, persistent best scores, and ranks - Game Center weekly and all-time high score leaderboards - Neon arcade presentation with original audio hooks

Screenshots

Escape the O4 screens
ISUD Zero4 screens

Verdict

The call

The clearest difference is price: Escape the O at Free against ISUD Zero's $0.99. ISUD Zero's advantage is in-app purchases (none vs 6) and ads (none vs shown). On 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

Escape the O is free to download; ISUD Zero costs $0.99 up front. Escape the O sells 6 one-off in-app purchases. ISUD Zero asks for nothing beyond the download.

Scorecard4 real differences · 4 level
Escape the O versus ISUD Zero: the parameters behind the verdict, then further details
ParameterEscape the OISUD Zero
PriceFree — better$0.99
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.515.0 — better
Further details — not scored
Size113 MB119 MB
Age rating12+12+
DeveloperNathaniel Van EveraSuwitcha Sugthana

In-app purchases

6 purchases

Escape the O

One-time6
  • Small Hint Pack$0.99
  • Tea for the Dev$0.99
  • Medium Hint Pack$1.49
Show 3 more
  • Large Hint Pack$1.99
  • Buy Mr. O a Treat$1.99
  • Extra Large Hint Pack$4.99
None

ISUD Zero

No in-app purchases

Questions

Is Escape the O free?
Escape the O is free to download, with in-app purchases available.
Is ISUD Zero free?
ISUD Zero costs $0.99, with no in-app purchases.
Do Escape the O or ISUD Zero have ads?
Escape the O shows ads; ISUD Zero does not.

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