Mobile UI And UX Engineering — small scale stack.
For each requirement below, pick the option that fits your build — recommended first, then free and cheaper alternatives — or skip what your project doesn't need. Tap the info icon next to any requirement to see why it matters.
Design System Hosting / Collaboration
Where your code actually runs and serves requests. Picking the right host affects speed, scaling, and how much ops work you do.Pricing & free-tier limitsFigma Free: 3 projects + 3 files. Pro $15/editor/mo (2026). Org $45/editor/mo. Penpot self-host: ~$5-20/mo infra (VPS) + Free unlimited.
Component Library Registry (Private npm)
A piece of your stack you may or may not need, depending on scope. Pick the option that fits — or skip it if your project doesn’t require this capability yet.Pricing & free-tier limitsGitHub Packages: Free 500MB storage + 1GB transfer/mo. Pro $4/user/mo. Artifactory Cloud from $98/mo. npm public free unlimited public.
UI Asset Storage (Icons, Images, Illustrations)
Where you keep files users upload or you serve — images, videos, documents — and how fast they reach visitors around the world.Pricing & free-tier limitsCloudinary Free: 25 credits = 25GB storage + 25GB BW/mo. Plus $99/mo: 100GB storage/BW. S3: $0.023/GB storage + $0.09/GB transfer.
Storybook / Design System Docs Hosting
Where your code actually runs and serves requests. Picking the right host affects speed, scaling, and how much ops work you do.Pricing & free-tier limitsVercel Hobby Free: 100GB BW, 6000 execution hrs. Pro $20/seat/mo + $20/mo base. Netlify Free 100GB BW. Chromatic Free 5k snapshots.
Visual Regression Testing
A piece of your stack you may or may not need, depending on scope. Pick the option that fits — or skip it if your project doesn’t require this capability yet.Pricing & free-tier limitsChromatic Free 5k snapshots/mo, $149/mo for 35k snapshots (2026). Percy Free 5k snapshots, $99/mo for 10k snapshots. Lost Pixel self-host free.
Accessibility Testing Infrastructure
A piece of your stack you may or may not need, depending on scope. Pick the option that fits — or skip it if your project doesn’t require this capability yet.Pricing & free-tier limitsaxe-core Free OSS unlimited. Lighthouse CI Free. BrowserStack Accessibility $129/mo (1 user) Starter, $199/mo Team. Deque axe DevTools Pro $40/dev/mo.
Device Farm / Responsive UI Testing
Delivers properly sized, fast-loading images. Big impact on page speed and bandwidth cost.Pricing & free-tier limitsLambdaTest Free 60 min/mo live testing. AWS Device Farm $0.17/min ($10.20/hr) device. BrowserStack Live $29/mo solo (1 parallel), Team $129/mo (5 parallels).
CI/CD for UI Builds
Automates testing and deploying your code. Saves enormous time and prevents “works on my machine” releases.Pricing & free-tier limitsGitHub Free 2000 Linux min/mo + 500MB packages. Team $4/user/mo: 3000 min. CircleCI Free 6000 credits/mo (~1000 min). Paid $15/mo + $0.00008/credit overage.
Icon Delivery & Icon Font Hosting
Where your code actually runs and serves requests. Picking the right host affects speed, scaling, and how much ops work you do.Pricing & free-tier limitsIconify Free unlimited API, no limit. jsDelivr Free unlimited. Font Awesome Pro $99/year (1 seat), $199/year team. IcoMoon Free, $25 one-time removal.
Animation Asset Hosting (Lottie, Rive)
Where your code actually runs and serves requests. Picking the right host affects speed, scaling, and how much ops work you do.Pricing & free-tier limitsLottieFiles Free unlimited public. Pro $19.99/mo: 500 private files. Enterprise $149/mo: SAML + analytics. Rive Free 1 workspace, Pro $12/editor/mo. R2 storage Free 10GB.
UI Interaction Analytics
Understands your users and supports them. Drives product decisions and retention.Pricing & free-tier limitsPostHog Free 1M events/mo, then $0.248/1k events (2026). Mixpanel Free 100k MTU/mo, Growth from $28/mo. Umami self-host ~$5/mo infra, free unlimited.
UI Performance Monitoring (FPS, Render)
Tells you when things break and why. You cannot fix what you cannot see — this is how you keep downtime short.Pricing & free-tier limitsSentry Free 5k errors + 10k transactions. Firebase Perf Free unlimited (sampling). Sentry Team $26/mo: 50k errors, Business $80/mo. Grafana Cloud Free 50GB logs.
Feature Flagging for UI Experiments / A/B
The visual and experience layer of your product. Good design drives conversion and trust.Pricing & free-tier limitsLaunchDarkly Free 1000 MAU, 1k flags. Starter $20/seat/mo + $20 per 1k extra MAU. PostHog Flags Free 1M requests. Unleash OSS free, Cloud $80/mo.
Image Optimization CDN for UI
Where you keep files users upload or you serve — images, videos, documents — and how fast they reach visitors around the world.Pricing & free-tier limitsImageKit Free 20GB BW/mo. Cloudflare Images $5/mo: 100k images stored, $1/100k delivered. Imgix Starter $75/mo: 100GB BW. Cloudinary Plus $99/mo.
Font Hosting & Delivery Optimization
Where your code actually runs and serves requests. Picking the right host affects speed, scaling, and how much ops work you do.Pricing & free-tier limitsGoogle Fonts Free unlimited. Bunny Fonts Free unlimited. Adobe Fonts included with CC $59.99/mo. Cloud.typography $99/year/domain. BunnyCDN $1-10/mo + $0.01/GB.
Secrets Management for UI SDK Keys
The visual and experience layer of your product. Good design drives conversion and trust.Pricing & free-tier limitsDoppler Free 5 projects, 3 envs. Team $12/user/mo unlimited. GitHub Secrets Free. Vault HCP $0.03/hr cluster. Infisical Free 5 projects, Cloud $20/mo.
Preview Deployments for UI PRs
An isolated place to test changes before real users see them. Catches bugs without embarrassing your production users.Pricing & free-tier limitsVercel Hobby Free unlimited previews, 100GB BW. Pro $20/seat/mo includes 1TB BW. Netlify Free 100GB BW. Overages $0.15/GB Vercel, $55/100GB pack.
Session Replay for UX Debugging
A piece of your stack you may or may not need, depending on scope. Pick the option that fits — or skip it if your project doesn’t require this capability yet.Pricing & free-tier limitsPostHog Free 15k recordings/mo, then $0.005/recording. LogRocket Free 1k sessions/mo. Team $99/mo 10k sessions, $0.02/session overage. OpenReplay self-host ~$10/mo infra.
Design Token Management & Sync
The visual and experience layer of your product. Good design drives conversion and trust.Pricing & free-tier limitsStyle Dictionary Free OSS. Tokens Studio Free 1 file sync, Pro $12/editor/mo. Figma Variables Free in Figma. Specify Starter $149/mo 2k tokens, Pro $399/mo.
How this small scale mobile ui and ux engineering checklist works.
Each requirement below is something a small scale mobile ui and ux engineering build typically needs. Pick one of the four researched options — recommended, free, cheaper or paid — add your own with "Other", or skip the requirement if your project doesn't need it. Nothing is mandatory; the plan on the right tracks what you've decided so nothing gets forgotten.
Your picks are saved in this browser automatically, so you can come back anytime. Options are researched per build level and refreshed as vendors change their plans — always verify details on the provider's page before committing.