O Sebo is a peer-to-peer marketplace for buying and selling used books on iOS.

The App DNA

What makes this app unique?

The platform removes the friction of finding local book sellers by providing shareable profile URLs that function as portable inventory displays.

For Individuals looking to buy or sell used books within a peer-to-peer marketplace.

What does it look like?

Key features

Book Marketplacestandard

Platform for buying and selling used books directly between users.

Public Profile Sharingedge

URL-based sharing of seller profiles to display available inventory, pulling non-users into the install funnel via web preview.

How much does it cost?

freeFree to use

The platform operates as a free marketplace without visible subscription or IAP gates, relying on organic user growth.

Velocity

Dormant developmentsocial featuresShow more...

O Sebo has reached a zombie state, with no updates or feature releases in over 1,959 days. The development activity has been non-existent for more than five years, indicating the project is no longer actively maintained. There is no evidence of ongoing support or engagement through the App Store.

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Who built it?

Robson Ribeiro

1 app tracked · Book

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User Sentiment

What do users think recently?

How are ratings & reviews evolving?

App Store
5.00 · 1

Not enough recent reviews to extract reliable themes yet.

Read the full review analysis

Competition

Competitive landscape for O Sebo

How's the Book market?

O Sebo occupies a static niche in the book marketplace category with no updates in over 1,900 days. The absence of active development limits its ability to compete with modern marketplaces that offer integrated logistics and payment security.

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The rivals identified

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The Analyst's Read

Key takeaways for O Sebo

Where is it heading?

The used book marketplace is consolidating around platforms that provide integrated shipping and secure payment escrow. O Sebo's five-year development freeze leaves it unable to compete with these standards, signaling a continued decline in relevance for the platform.

  • The 1960-day update gap indicates a total cessation of feature investment, which accelerates user migration to active, modern alternatives.
  • Absence of modern payment and shipping integrations makes O Sebo less attractive than contemporary marketplace apps, reducing long-term retention.

The SWOT

Core Strengths
  • URL-based seller profile sharing enables web-to-app discovery
Critical Frictions 2 weaknesses inside
Growth Levers
  • Integrated payment processing could capture transaction fees
Market Threats 1 threat identified

Next best moves

1 Maintain

Audit current backend infrastructure because the 5-year update gap poses a critical security risk → ensure platform viability

The counter-intuitive read

The lack of monetization is not a feature…

Read the full take

Since the last report: The internal strategic outlook shifted from a recommendation to sunset the platform to a maintenance-focused audit of the legacy backend. This change acknowledges the security risks inherent in the five-year development gap.

Bottom line

O Sebo functions as a static directory, but the five-year development gap makes it a high-churn risk against any competitor offering modern transaction security.

Unlock 2 critical frictions, 1 market threat and the analyst’s take.

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FAQ

Is O Sebo free to use?
Yes, O Sebo operates as a free marketplace for buying and selling used books without subscription fees or in-app purchases.
How does O Sebo compare to other book marketplaces?
O Sebo is a specialized peer-to-peer platform that lacks the integrated payment and shipping features found in larger, more frequently updated marketplace apps.
Is O Sebo still being updated?
No, O Sebo has not received a store update since April 2021, indicating that the platform is currently in a maintenance-only state.

Sources

  1. [1] App Store, source

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by O Sebo, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The internal strategic outlook shifted from a recommendation to sunset the platform to a maintenance-focused audit of the legacy backend. This change acknowledges the security risks inherent in the five-year development gap.

shifted

Strategic Pivot to Maintenance

added

Security and Competitive Threat Identification

Cite this report

Marlvel.ai. “O Sebo Intelligence Report.” Updated Aug 31, 2026. https://marlvel.ai/apps/o-sebo

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