# PostProof — Creator Safe Zone Checker

> Creator Safe Zone Checker (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/postproof/id6768481387 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Photo & Video, Productivity
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-05-12
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/postproof/id6768481387/reviews.md

## What is PostProof?

NEW — Retention Radar: a whole-clip pacing timeline that finds the boring middle. Motion-energy curve, scene-cut count, and located dead spots with timestamps, all measured on device.

PostProof is a final-pass video checker for creators who want to catch publishing problems before export.

Import a short-form video, pick a generic layout, and PostProof shows pixel-accurate safe zones, stylized feed controls, caption risk with coverage percentages, face risk, cover options, trim controls, export settings, and a publish-readiness plan in one focused workflow.

What you can do with PostProof:

- preview a clip inside a generic short-form video overlay
- run FrameCheck to see whether text, faces, or details may be covered
- compare coverage results across the bundled layouts
- get a ranked Publish Readiness Plan with the highest-priority fixes first
- review safe-zone, audio, readable-text, frame-fill, cover, and Stop Score checks together
- get a Stop Score, muted-readability score, loop score, and tap-to-open score breakdowns
- place a short caption that snaps inside the center-safe area
- browse an offline specs cheat sheet for aspect, duration, resolution, bitrate, and frame rate
- use bundled caption prompts and tags for drafting posting copy
- choose a cover frame scored on exposure, sharpness, contrast, and subject presence
- trim the start and end before export
- export a 720p or 1080p posting copy
- save each run to a local Proofs history
- see a Stop Score trend chart across saved proofs
- compare two saved proofs side by side
- open a full detail sheet with score breakdowns and caption copy

Layouts use generic, layout-descriptive names such as Tall-Caption Vertical, Right-Rail Vertical, Title-Bar Vertical, and Square Timeline. PostProof uses no social-platform brand names.

PostProof is not a social network and does not post for you. It is the quick check before you upload: make sure the caption is readable, the face stays clear, the cover is strong, and the clip is ready to share.

Privacy is simple:

- no account required
- no developer cloud
- no analytics SDK
- no advertising SDK
- no tracking
- video analysis runs on device

PostProof is not affiliated with, endorsed by, or sponsored by any social media platform.


## Version history (last 5 releases)

### 2.2 — 2026-08-19

New — Retention Radar. PostProof now watches your WHOLE clip, not just the hook. A motion-energy timeline across the entire video shows where viewers are most likely to bounce, flags the dead spots (still, near-silent stretches) with exact timestamps, counts your cuts and average shot length, and hands a slow open or flat ending straight into Trim & Ship. It's the pacing read no other pre-publish tool gives you — and like everything in PostProof, it runs entirely on device. No account, no upload.

### 2.1 — 2026-06-30

## Publish Readiness Plan

PostProof now builds a ranked pre-export checklist from the same analysis engines creators already use in the app. The plan combines layout collision risk, cross-layout safety, loudness, readable text dwell time, frame fill, cover quality, and Stop Score into one readiness score with the most important fixes first.

## Cleaner Decision Flow

The new readiness panel sits near FrameCheck so creators can move from "what is wrong?" to "what should I fix first?" without hunting across separate panels. Each issue includes a status, plain-English detail, and a concrete fix.

## Store Package Refresh

Version 2.1 includes updated App Store copy, support documentation, privacy documentation, and fresh screenshots that show the current creator QA workflow in use.

### 2.0.1 — 2026-06-25

This update sharpens the interface: the iPad layout now uses a centered, comfortable reading width instead of stretching edge to edge, plus small display fixes. iPhone is unchanged.

### 2.0 — 2026-06-21

PostProof 2.0 — a pro upgrade for your final pre-post check, still fully offline and on-device.

• Loudness & silence check: integrated loudness and true-peak vs. the short-form sweet spot, with a clear too-quiet / clipping verdict.
• Text dwell-time checker: flags on-screen text that flashes by too fast to read, line by line.
• Letterbox / pillarbox detector: catches black bars that read as a lazy cross-post and cut your reach.
• "Works everywhere?" cross-layout report: tests your text against every platform's chrome in one pass.
• Cover-frame audit: exposure, sharpness, contrast, a credibility cue, and safe placement for your first frame.
• Export a PDF proof report bundling every score and fix.

No account, no network, no uploads — your clip never leaves your device.

### 1.3 — 2026-06-20

What's New in PostProof 1.3

Best-Layout Recommendation
After FrameCheck runs, a new panel immediately below it ranks all 10 layouts best-to-worst for your specific clip - by covered regions, worst coverage ratio, duration fit, and aspect match. The top pick gets a hero card with a plain-English reason ("Nothing gets covered and the shape is native.") and a Fit score. Tap it to switch to that layout instantly. The remaining 9 are shown as compact chips in ranked order, so you no longer have to read all 10 manually to find the cleanest option.

Cover Frame Scrubber
The cover picker now includes a full-range time scrubber that lets you pull any exact frame from the clip - not just the 4-8 auto-sampled options. Drag the slider to any second, and PostProof extracts that frame on-device, scores it with the same sharpness, contrast, and face-detection pipeline used during analysis, and previews it with a comparable score pill. The auto-sampled picks stay visible below for quick reference.

Hashtag Presets (Offline)
The caption pack now includes 10 bundled hashtag sets by creator category - Education, Comedy, Lifestyle, Beauty, Fitness, Food, Tech, Travel, Music, and Creator Growth - 80 tags total, all offline. Tap a category chip to expand its tags, then hit "Add" to merge them into your hashtag draft (skipping any duplicates) or "Replace" to swap the draft entirely.

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## More apps by Robert Corbin

- [Daily Word Journey](https://appshunter.io/ios/app/daily-word-journey/id6761548266)
- [Hush Secret Text](https://appshunter.io/ios/app/hush-secret-text/id6761658175)
- [Renew Guard](https://appshunter.io/ios/app/renew-guard/id6761755447)
- [Receipt to PDF](https://appshunter.io/ios/app/receipt-to-pdf/id6761782025)
- [Route Your Pay](https://appshunter.io/ios/app/route-your-pay/id6761783719)
- [Tip Arbiter](https://appshunter.io/ios/app/tip-arbiter/id6761786879)

All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*