Constraint Engine
Stop thinking. Start creating.
Free · In‑App Purchases
Stop thinking. Start creating.
Constraint Engine is the antidote to the blank page. Pick your craft, hit
generate, get a sharp one-sentence constraint, start the timer, and make
something. No infinite scrolling, no "what should I do today" spiral — just
a specific creative restriction and a clock.
The science is older than the app: constraints unlock creativity. Limit your
palette, your time, your tools, and your brain stops searching and starts
making. Every great song, film, and design came from someone working inside
a box. Constraint Engine builds you the box.
— BUILT FOR 10 CRAFTS —
Music (producer / beatmaker) · Songwriter · Writer · Visual Art ·
Photography · Filmmaking · Game Dev · Developer · Content Creator · Cook.
Every constraint is tailored to your craft's vocabulary, tools, and
formats — nothing generic.
— FREE —
• Hand-curated constraints across all 10 crafts
• Time-boxed session timer (5 min to a full weekend)
• 3 difficulty tiers — Easy, Medium, Hard
• Daily challenge — one shared constraint a day for the whole app
• XP, levels, streaks, badges — built to make showing up feel good
• Save your favorites, replay them whenever
• Beautifully designed share card for every session (Instagram, TikTok,
iMessage) — no watermarks
• Fully usable without an account, email, or any personal data
— PRO (AI GHOST-WRITER MODE) —
Upgrade to Pro and your constraints are written live by AI in the
voice of someone who actually works in your lane:
• Genre & style selection (Music, Songwriter, Visual Art)
• Vibe picker (Mood + Sound Focus for Music; Tone + Theme for Songwriter)
— pick up to 3 descriptors and the AI uses real producer / writer
vocabulary, not generic "music words"
• A fresh, AI-written DAILY CHALLENGE every day — never the same twice
• "Chaos Mode" — bolder, rule-breaking variants of any constraint
• Cross-craft chaos chains — finish a song, get the AI to write you the
music video shoot ideas to match
• "Save to Collection" your best AI constraints, replay them any time
— PRIVACY-FIRST —
• No account required. No email, no sign-up, ever.
• No analytics SDKs. No ad networks. No tracking.
• Your XP, streaks, history, name, and avatar live only on your device.
• Apple handles all subscription billing — we never see your payment info.
• Full policy: see Privacy Policy link in App Store.
— SUBSCRIPTION —
Constraint Engine Pro is an auto-renewable subscription via Apple. Choose
monthly or annual (annual saves you 50%). Cancel anytime in your Apple ID
subscription settings. Pro unlocks the AI features above; the free tier
remains fully functional forever.
— FROM THE MAKER —
Constraint Engine is built by an indie developer who got tired of staring
at a blank screen and decided to engineer his way out of it. If you have
feedback, ideas, or just want to share what you made — focused.era1@gmail.com.
Now go make something.
Standard Apple Terms of Use (EULA) - https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Refinements and reliability improvements.
• Smarter, more varied AI constraints
• Fixed an issue where the Art "Scale" detail could show a non-scale value
• Performance and stability tweaks
The developer, Mark Barker, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Mark Barker
- Size
- 10.5 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Constraint Engine Pro $4.99
- Constraint Engine Pro $29.99
- Copyright
- © FocusedEra Labs