Sharp tools, grown carefully.

We build small, focused, no-nonsense software for independent commerce — starting with Shopify.

See the apps Get support
Wallflower posting studio interfaceWallflower
Undertone quiz builder interfaceUndertone
Kept returns builder interfaceKept

What we're growing

Shopify · Returns

Kept

A return-prevention quiz for your storefront. It answers “can I return this?” instantly, shuts down avoidable returns, and steers the rest toward an exchange — politely, firmly, automatically.

Coming to the Shopify App Store
Overview Docs Privacy
Shopify · Guided selling

Undertone

A skin quiz that turns browsing into a routine. Shoppers answer five questions; Undertone builds their regimen from your own catalog — matched, explained, and ready to add to cart.

Coming soon
Shopify · Social

Wallflower

A shoppable social wall you own. Plan posts, approve them into a calm queue, and grow a wall on your storefront that no platform API change can ever break.

Coming soon

Seedling № 4

Always one in the ground — store sync, recommendations, and notifications are sprouting next. Announcing each when it breaks the surface.

The studio

Foilgrass is a small, independent software studio. We grow narrow tools that do one job extremely well — then keep them sharp. No bloat, no dark patterns, no feature sprawl.

Resilient, like grassGrass bends without breaking and grows back on its own. Our apps hold up the same way — small, hardy, and dependable through theme changes, traffic spikes, and platform churn.
Light, like foilAluminum carries real strength at almost no weight. Every app stays lean and fast — one job done extremely well, with zero bloat dragging on your storefront.
Protective, by designFoil exists to keep good things good. Your policies enforced politely, your data kept yours, shopper privacy built in — no dark patterns, ever.

Support

Need a hand?

Real answers from the people who built the thing. We aim to reply within one business day.

hello@foilgrass.com

Already using one of the apps? Write to it directly — kept@foilgrass.com for Kept, with an address for every app as it launches. Setup guides live inside each app and in the docs.