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OneStar turns App Store, Google Play and Steam reviews into one report, with the reviews behind every number

A one person company's review analyzer shows what it is unsure about, runs on any competitor's app, and is free to read. Its public reports have read more than 195,000 reviews of 83 apps and games so far.

TAMPA, Fla., October 15, 2026. OneStar (onestar.sh), a review analyzer for the App Store, Google Play and Steam, is open to anyone after launching on Product Hunt on October 8. Search any app or game by name and OneStar reads thousands of its reviews and returns one report: what users love, why they leave and what they ask for. Every number in the report opens the reviews it was counted from.

A popular app collects thousands of reviews a month and the store boils them down to one number. The number moves, and it never says what moved it. The reasons are all in the text. For one person with one app, the choices have been reading reviews by hand, paying for a tool priced for a team, or pasting reviews into a chatbot and hoping.

OneStar takes a different route. Jev, a model from TypeSafe built for typed judgments, answers the same twelve questions of every review on its own: is there a complaint, which theme, how severe, does the reviewer say they are leaving, is there praise, what do they ask for. Each answer is one option from a fixed list with a probability, never free text. Plain code then counts the answers into shares, trends, audience splits and the impact of each release, so a figure is exact for the reviews read and can be rebuilt without asking the model again. On Max, an LLM then writes short passages about those counts, such as what to fix first and who feels it most, and code fills in every figure and quote it uses.

"The thing I did not want to build was another AI summary," said Jared Watson, who makes OneStar. "A summary sounds sure whether it is or not. In OneStar a model labels each review and code does the counting, so every number opens the reviews it came from, and when the model is not confident the review goes in an unsure bucket you can see. On Max an LLM also writes up what the numbers mean, but it never types a figure or a quote itself. Code fills those in from the report, so the write-up can be checked like everything else."

Each question is scored against labeled sets of 300 real reviews per kind of product before it ships, and the confidence an answer needs to count comes from those scores. The method page at onestar.sh/method shows the results per question.

OneStar reads reviews for any app or game, so a developer can run it on a competitor as easily as on their own product, and Compare puts up to four apps side by side on the same themes. Steam is covered alongside the two mobile stores, with review bomb days flagged by their volume and complaints split by playtime. Developers who connect App Store Connect or Google Play Console get every country and the full history of their own app, alerts when a complaint spikes or a rating drops, a weekly digest, Slack, and an inbox for replying to reviews.

Reviewer names are never read, raw review text never touches disk, only excerpts of up to 200 characters are stored, and personal details are removed before anything else sees the text.

Public reports on well known apps and games, from Spotify and ChatGPT to Counter-Strike 2 and Baldur's Gate 3, are free to read without an account at onestar.sh/reports. A free account runs three reports a month of up to 500 reviews each, with no card. Pro is $19 a month or $190 a year and reads up to 5,000 reviews a report; Max is $49 a month or $490 a year for up to 25,000.

About OneStar

OneStar is a review analyzer for the App Store, Google Play and Steam. It reads the reviews of any app or game and turns them into one report: what users love, what they complain about, why they say they are leaving and what they ask for. Each review gets the same set of questions, answered with a probability by the Jev model from TypeSafe, code does the counting, and on Max an LLM writes up what the counts mean. Every number opens the reviews behind it and uncertain answers are shown as unsure. It is built for indie developers, small studios and product people, with a free plan and Pro at $19 a month. OneStar is made by Jared Watson in Tampa, Florida. onestar.sh

Press kit, screenshots and logos: onestar.sh/press

Contact
Jared Watson
jared@onestar.sh
x.com/jared_watson1
