Supported Features
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VoiceOver
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Voice Control
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Larger Text
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Dark Interface
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Differentiate Without Colour Alone
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Sufficient Contrast
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Reduced Motion
Zero Substrate: Cyber Thriller
A case file you investigate
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
One body. One set of DNA. Three living people, all with alibis, all claiming they have never met. Chapter one is free.
The arterial spray hit the wall at forty-seven degrees. Not forty-five. Not fifty. Exactly forty-seven, like someone calculated the trajectory with software before swinging.
A body on the floor of a Substrate BioLabs executive. One set of DNA. Three living people, all with alibis, all claiming they have never met. The lab ran it three times. Same result each time.
Zero Substrate is a forensic thriller told the way a case lands on your desk. Twelve chapters of first-person investigation, built as a case file rather than a novel: classified memos, DNA trace reports, chain-of-custody logs, intercepted audio, witness testimony. The documents are not illustrations of the story. They are the story.
THE INVESTIGATION
Evidence unlocks as you read. Reach the moment in the text where something surfaces and it lands in your Evidence Vault, where you can examine it properly and return to it later. The vault fills as the case does. By the end you are holding everything the investigator was holding, and you know exactly when each piece arrived.
BUILT FOR READING
A reader designed for long sessions in the dark. Three text sizes, a dim mode for night, bookmarks that hold your place mid-sentence, and progress tracked per chapter. Reading statistics if you want them, out of the way if you do not.
WHAT IS INSIDE
- Twelve connected chapters, a single continuous case
- An Evidence Vault that fills as you read
- Case files, forensic reports, transcripts and recordings
- Bookmarks, per-chapter progress and reading statistics
- Full Japanese translation
- Completely offline
CHAPTER ONE IS FREE
Read the first chapter, all of it, before deciding. Unlocking the remaining eleven is a single purchase. No subscription, no second unlock, no advertising, no accounts.
PRIVACY
Nothing is collected. No analytics, no tracking, no sign-in. Your progress, bookmarks and evidence stay on your device and go nowhere else. The app works with the network off.
Twenty years before VOID, this is where it started.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
- Sharper reading statistics: your time in the case file is now tracked exactly
- Evidence arrives more reliably, so nothing is missed on the way through a chapter
- Smoother, lighter reader over long sessions
- Better VoiceOver support throughout the reader and settings
- Refinements to the Japanese translation
The developer, DRO1D LABS LIMITED, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Provider
- DRO1D LABS LIMITED
- Size
- 15 MB
- Category
- Books
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
13+
- 13+
- Frequent
Profanity or Crude Humour
Infrequent
Realistic Violence
Mature or Suggestive Themes
Horror/Fear Themes
Sexual Content or Nudity
Guns or Other Weapons
- In-App Purchases
Yes
- Unlock All Chapters USD 5.99
- Copyright
- © 2026 Dro1d Labs Limited