Specverge: API Contract
Diff APIs Before Release
$2.99 · Designed for iPad. Not verified for macOS.
An on-device API contract compatibility gate: compare two versions of a REST contract and see, before you ship, exactly which changes will break your consumers.
Specverge is an API contract compatibility gate you can run entirely on device — compare two versions of a REST contract and see, before you ship, exactly which changes will break your consumers.
It opens on a worked example: a projects API moving from 2.4 to a 2.5 candidate. Specverge diffs the two contracts and classifies every change as Breaking, Review, or Compatible — endpoint removals, field removals, type narrowing (for example string to boolean), a previously optional field becoming required, a new required field, and dropped response codes are all caught, each with concrete remediation advice.
The Release tab turns the findings into a single release score with route-coverage and open-breaking read-outs, an impact chart, and a ship / hold recommendation. It is interactive: as you waive each breaking change — once you have a migration plan for it — the score and recommendation update live. The Changes tab lists every finding with an impact filter, and the Routes tab draws the endpoint topology with per-endpoint field counts.
FEATURES
• Breaking / Review / Compatible classification with remediation
• Detects removals, type narrowing, and new required fields
• Live release score you drive by waiving resolved changes
• Impact-filtered findings list
• Endpoint topology map
PREMIUM BY DESIGN
One-time purchase. No account, no ads, no analytics, no tracking, no in-app purchases, and no network access — Specverge runs entirely on your device, fully offline.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Specverge 1.1 is a focused redesign around three fast screens. The Release gate is now interactive: waive each breaking change as you plan its migration and watch the release score and ship/hold recommendation update live. Changes adds an impact filter, and Routes draws the endpoint topology. Unused assets were removed to shrink the download.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 2.4 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Corbin
