We build the tool we always needed
Marteso started as an internal tool. We were building mobile apps, spending hours every week manually checking keyword rankings, copying metadata between spreadsheets, and reacting to competitor moves days too late. At some point we realized the tooling was the problem — so we fixed it.
Make organic growth measurable and repeatable
Most mobile teams treat ASO as a one-time setup task: write a description, pick some keywords, move on. They're leaving downloads on the table every single day. We built Marteso to change that — to make ongoing ASO as systematic and data-driven as any other growth channel.
We track over 2.4 million keywords across the App Store and Google Play. We analyze competitor metadata in real time. We flag ranking drops before they compound into real losses. And we do all of this so that mobile teams can stop guessing and start compounding.
Data over intuition
Every recommendation Marteso makes is backed by real ranking data. We show you the numbers, not just the conclusion — so you can develop genuine ASO intuition over time, not just dependency on a tool.
Speed over perfection
The App Store rewards velocity. Teams that iterate keyword strategy monthly consistently outperform teams that do it quarterly, even when the quarterly updates are more carefully crafted. Marteso is designed to make fast iteration the path of least resistance.
Transparency over magic
We don't sell a black box. When Marteso surfaces a recommendation, we show you the signal that triggered it, the data behind it, and an honest estimate of the expected impact. You decide. We inform.
Built for builders
Marteso is made for indie developers, small mobile teams, and growth-focused companies who care deeply about their product. We don't build for enterprise procurement processes — we build for people who are actually in App Store Connect every week.
The Fringelo ecosystem
Marteso is built and operated by Fringelo Group — a small team of developers and product people who build focused software tools for app creators. Fringelo's mission is to give independent developers access to the same quality of tooling that large companies build internally.
We're based in Europe, bootstrapped, and obsessively focused on building tools that earn their place in your workflow.
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