Mobile FIRST
Simulate 81 smartphones and tablets in your browser for responsive web design testing.
Recommended for
- Solo / Indie
- Pre-Seed
- Seed
SSIE
Stage Fit Recommendations
Following data shows why Mobile FIRST is recommended for listed teams. The Fit Score represents the percentage fit of Mobile FIRST to each company stages, as calculated by the SSIE.
Stage
Fit Score
Fit Reasons
Solo / Indie
$0–$2,000 MRR
91- Simulates mobile devices for responsive testing
- Test local sites without an account
- Free plan covers a solo founder at no cost
Pre-Seed
$0–$10k MRR
95- Exports screenshots and videos for client demos
- Pro plans allow unlimited videos
- Team plan supports up to twenty users
- Free plan covers about 2 users at no cost
Seed
$10k–$100k MRR
87- Works as a browser extension
- Compare multiple device views side by side
- Free plan covers about 3 users at no cost

Description
Mobile FIRST is a browser extension that simulates 81 smartphones and tablets with exact CSS viewports. It allows multi-device comparison, PNG captures, and video recording. The free version includes ads and limited devices, while paid plans offer more features. The extension supports touch gestures, zoom, and landscape mode. Paid plans include live device access with a monthly minute quota. The tool is used by developers and designers for responsive web design testing and client demos.
Pricing
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