Sifr is a mobile-first, agentic IDE. The full power of AI-assisted development, on your phone, for your real projects.

Not an app builder. Not a code playground. A real development environment where AI writes code and you direct, review, and ship.

We're in the age of AI writing 95% of code. This changes what "development" means.

Old World

  • Developer types code
  • Keyboard is essential
  • IDE = text editor
  • Work happens at desk

New World

  • AI writes code
  • Keyboard is optional
  • IDE = AI director + reviewer
  • Work happens anywhere

The bottleneck has moved. It's no longer typing speed or syntax knowledge. It's:

  • Directing — Telling AI what to build
  • Reviewing — Understanding what AI produced
  • Shipping — Committing and pushing when ready

None of these require a keyboard. They require intent and judgment.

The old objection: "You can't code on a phone."

But if AI writes the code, you don't need to type. You need to:

  • →
    Express intent — Natural language is easy on mobile
  • →
    Review diffs — Reading is fine on mobile
  • →
    Approve actions — Tap yes/no is perfect for mobile
  • →
    Ship when ready — One tap is ideal for mobile

Sifr isn't "Cursor but smaller." It's built for a world where the developer's job has fundamentally changed.

A mobile-first, agentic IDE for your real projects.

Sifr Is

  • Agentic IDE for your phone
  • Full workflow on existing repos
  • AI that executes in real sandboxes
  • Git-native (status, commit, push)
  • Developer tool

Sifr Is Not

  • Chat app that talks about code
  • App generator for new projects
  • AI that just suggests code
  • Copy-paste workflow
  • No-code tool for non-developers

You:

"Add rate limiting to the /api/users endpoint"

Sifr AI:

→ Reads your codebase

→ Plans the implementation

→ Writes the code

→ Shows you exactly what changed

→ Waits for your approval

→ Commits and pushes when you say go

permission system

The key differentiator. You control how much freedom AI has.

  • Three presets: Safe (read-only), Balanced (ask first), Autonomous (run freely)
  • See exactly what AI will do before it happens
  • 45-second approval countdown with full context
  • Session memory: 'Remember for this session' reduces friction
  • Command allowlist/denylist for fine-grained control
  • Protected paths that AI can never touch

background execution

Start a task, close the app, return to completed work.

  • AI continues working when app is backgrounded
  • iOS Live Activities show progress in Dynamic Island
  • Push notifications for completions and approvals
  • Auto-continue for long-running tasks (up to 1000 steps)
  • Seamless reconnection — never lose progress
  • Event replay catches you up on missed activity

cli credentials

Deploy to production from your phone. Securely.

  • Store Expo, NPM, AWS, GCP, Apple credentials
  • AES-256 encrypted at rest
  • Credentials injected only when commands run
  • Never exposed in chat or logs
  • Audit trail for all credential usage
  • Add custom environment variables for any service

ai-powered development

60+ tools at your service. Read files, write code, run commands, manage git — all through natural language.

  • Real-time streaming — watch AI think live
  • Multi-modal: read images, PDFs, and screenshots
  • Web search for documentation and solutions
  • Context memory survives long conversations
  • Model-specific optimization for Claude, GPT, Gemini
  • Todo tracking shows progress as AI works

full git workflow

Not a simulation. Real git operations on real repositories.

  • git.status, git.diff, git.add, git.commit, git.push
  • Create pull requests directly from the app
  • Co-authored commits for AI contributions
  • git.log, git.checkout, git.discard
  • Line-by-line diff viewer before you approve

file operations

Full control over your codebase.

  • file.read — Read files, images, and PDFs
  • file.write — Create or overwrite files
  • file.edit — Aider-style search/replace for large files
  • file.apply_diff — Precise changes via unified diff
  • web_search — Find documentation and solutions
  • repo.search — Search codebase with ripgrep

command execution

Run any command in your workspace.

  • npm, yarn, pnpm, cargo, pip, go — any package manager
  • Build commands, test runners, linters
  • Output captured and displayed
  • Protected by permission system

cloud workspaces

Instant-on development environments. No local setup required.

  • Sub-100ms workspace startup (Daytona sandboxes)
  • Persistent storage across sessions
  • Full conversation history saved
  • Isolated sandbox for every project
  • Resume any session where you left off

multi-model ai

Pick the right AI for the task, or let Sifr choose for you. Powered by OpenRouter.

  • Claude (Sonnet, Opus, Haiku)
  • GPT-4o and other OpenAI models
  • Google Gemini models
  • Mistral, Llama, and more
  • Smart auto-routing based on task complexity
  • Switch models mid-conversation
  • New models added as they become available

transparent pricing

Pay for compute, not seats. See exactly what you're spending.

  • Real-time cost tracking as you work
  • Per-request breakdown (input/output tokens)
  • All models available on all plans
  • Top up anytime — credits never expire
  • No surprise bills

session & history

Your work is always saved.

  • Full conversation history per session
  • Session list with timestamps
  • Resume any conversation
  • Context preserved across app restarts

project memory

AI remembers your project context.

  • AGENTS.md file support
  • Custom instructions per project
  • Architecture notes, conventions, commands
  • AI follows your coding standards

Understanding where Sifr fits in the AI coding landscape.

vs. Desktop IDEs (Cursor, Windsurf)

They're powerful but desktop-only. We bring that power to mobile.

Sifr advantage: Mobile-native experience for on-the-go development

vs. App Builders (Vibecode, Rork, Bolt.new)

They generate new apps from scratch. We work on your existing codebases.

Sifr advantage: Connect GitHub, work on real repos, push real changes

vs. Cloud IDEs (Replit, Gitpod)

Their mobile apps are desktop adaptations. Sifr is mobile-first.

Sifr advantage: Built for touch, not adapted from keyboard

vs. AI Assistants (ChatGPT, Claude.ai)

They talk about code. Sifr executes in real sandboxes with real git.

Sifr advantage: Full workflow from chat to commit to push

60+
AI tools
20+
AI models
24hr
background execution
<100
ms startup

Sifr (صفر)

Arabic for "zero" — the origin of the word "cipher" and the concept of zero in mathematics. The concept of zero as a number originated in the Islamic Golden Age, revolutionizing mathematics and making modern computing possible.

From zero, everything is built. From nothing, Sifr creates working software.

Jabr (جبر)

Our internal AI harness layer. The word is the root of "algebra" — it means "completion" or "restoration."

Jabr takes incomplete intent and completes it into working code.

Compute-based, not seat-based. All features on all tiers. Subscribe via App Store or Stripe.

Free

$0/mo

$5 compute included

  • All 59 tools
  • All AI models
  • Full git workflow
  • Top-ups available

Pro

$20/mo

$20 compute included

  • Everything in Free
  • Priority support
  • Higher rate limits

Max

$60/mo

$60 compute included

  • Everything in Pro
  • Highest rate limits
  • Early access to features
0

Join the waitlist for early access to Sifr.

Join the Waitlist