Comparison

ISUD Zero vs RobozzleReboot

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

Head to head
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

About

RobozzleReboot

Guide a robot through grid-based puzzles by dragging and dropping programming instructions. Collect all stars and reach the goal. Features a campaign, community-created levels, and a puzzle editor.

Highlights
  • Drag-and-drop programming interface
  • Campaign mode with curated puzzles
  • Community puzzle catalog
  • Built-in puzzle editor
  • Global leaderboard integration
  • Step-by-step program execution
Features
Read full description

Robozzle Reboot brings back the classic robot-programming puzzle game to iOS — write tiny programs to guide a robot around a grid, collect every star, and reach the end. No syntax to memorize: every puzzle is solved by dragging instructions into place. HOW IT WORKS Program your robot with a small set of building blocks: move forward, turn left, turn right, paint a tile, and call one of five subroutines (F1–F5). Any instruction can be conditioned on the color of the tile the robot is standing on, so a handful of slots can express surprisingly deep logic. Run your program step-by-step or at full speed, and iterate until every star is collected. CAMPAIGN + COMMUNITY PUZZLES Work through a curated Campaign of puzzles from Robozzle's original creators, sorted by difficulty from your first steps to genuine head-scratchers. Or dive into Community Puzzles — the full catalog, searchable and sortable, with ratings from other players. BUILD YOUR OWN Design and publish your own puzzles with the built-in puzzle editor. Lay out the grid, place stars and colored tiles, test your solution, then share it with the community. TRACK YOUR PROGRESS Sign in with Apple to claim a pseudonym, appear on the global Leaderboard, and rate the puzzles you play. Earn points for every puzzle you solve, and pick up right where you left off — your progress is saved automatically. NEW TO ROBOZZLE? Start with the in-app Tutorials, a short series of levels that introduce each instruction one at a time. Robozzle is an original game by Igor Ostrovsky and other contributors (robozzle.com). Robozzle Reboot is a fresh implementation, built with the original author's agreement.

Screenshots

ISUD Zero4 screens
RobozzleReboot4 screens

Verdict

The call

The clearest difference is price: RobozzleReboot at Free against ISUD Zero's $0.99. RobozzleReboot also leads on iOS requirement (13.0 vs 15.0). 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

RobozzleReboot is free to download; ISUD Zero costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
ISUD Zero versus RobozzleReboot: the parameters behind the verdict, then further details
ParameterISUD ZeroRobozzleReboot
Price$0.99Free — better
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequency—Every 4 weeks
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size119 MB21 MB
Age rating12+4+
DeveloperSuwitcha SugthanaNicolas Widynski

In-app purchases

None

ISUD Zero

No in-app purchases

None

RobozzleReboot

No in-app purchases

Questions

Is ISUD Zero free?
ISUD Zero costs $0.99, with no in-app purchases.
Is RobozzleReboot free?
RobozzleReboot is free to download, with no in-app purchases.
Do ISUD Zero or RobozzleReboot have ads?
Neither ISUD Zero nor RobozzleReboot shows ads.

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