Antonio Lozano · Product Designer

SublyNov 2025 – Feb 2026

Product owner and designer

Audio description for people who had never made one

Audio description is the one accessibility feature you cannot check by looking at it. Subly sold to companies working to a legal deadline, and this was the last piece missing. I owned the interface and the prompt architecture. It took three releases before the output was worth selling.

7×The cost of the manual job: a writer, a voice artist and a mix, done in one run.
3Releases, November to February. Two weeks from shipping to knowing what to change.
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Descriptions in order beside the video. Turn captions on and the dialogue appears in the gaps each description was written into.
Descriptions in order beside the video. Turn captions on and the dialogue appears in the gaps each description was written into.
Export. Tick what you need and the panel underneath names the exact files you get, with their length and their timings.
Export. Tick what you need and the panel underneath names the exact files you get, with their length and their timings.

Showboat2026

Monetisation strategy and iOS

Giving a live collecting app a reason to come back

A live app for football shirt collectors, built around one question: what is my collection worth. That is a question you ask once. I modelled the ceiling that puts on the business, then redesigned the profile and the lists so a collection becomes something other people come back to look at.

35,000+Shirts collectors have already uploaded to the live app.
4.4%Of users already pay for premium, a healthy rate for a consumer app. Conversion was never the problem, which is what made the low revenue confusing.
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The profile. A collection led as a shape rather than a count: the shirt full bleed, then what it is made of.
The profileA collection led as a shape rather than a count: the shirt full bleed, then what it is made of.
The reelTap the shirt on the profile and the collection opens full screen. Down is the next shirt, sideways is the same shirt from another angle.

Subly2024

Product Strategy

Turning a creator tool into something a company could buy

Subly sold to individual creators. They left at ten and a half percent a month, and companies kept asking about it and then not buying, always for the same reason. I led the pivot as product lead and sole designer.

10.5% → 3.5%Monthly churn. The target was below 5%. Source: ProfitWell.
+220%Customer lifetime value, the goal annual contracts were meant to move. Source: ProfitWell.
+23%Unique users hitting upload. The target was 15%. Source: Mixpanel.
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Moving media between folders while respecting inherited permissions.
Moving media between folders while respecting inherited permissions.
Roles carry their consequence in the menu, so nobody has to read a permissions table.
Roles carry their consequence in the menu, so nobody has to read a permissions table.

Three products I designed and coded

Interface, database, payments, deploy. All three are in production.

TruequeGo home page and ticket search
Marketplace TruequeGo

Spain’s cheapest rail fares refund nothing. Sell the seat you cannot use, capped at what you paid, with the money held until the journey happens.

Case study truequego.com
Pumcha club finances: income, expenses and transactions
Nightclubs Pumcha

The back office a nightclub runs on. Events, lineups, guest lists, and the money behind them.

Case study pumcha.com

For the love of technology, music and art

Small things I make for myself. Sound turned into drawing, typing turned into composition, and a keyboard that plays.

Ommmm
Ommmm An audio-reactive canvas that turns sound into art. Interactive · Web
TypeType
TypeType A playful typing experience where every keypress reshapes the composition. Interaction · Web
Clack
Clack A macOS menu bar app that makes your typing musical. macOS · Swift