PostCode vs Html Preview
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PostCode
This utility app helps video editors perform complex timecode calculations and frame rate conversions. It supports adding, subtracting, multiplying, and dividing timecode, calculating total run times, and instantly converting between various frame rates. Designed for professional post-production workflows.
- Timecode arithmetic (add, subtract, multiply, divide)
- Total run time calculation from In/Out points
- Instant frame rate conversion
- Toggle between timecode and frame count
- Support for all standard and custom frame rates
- Export calculations as CSV or TXT
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PostCode is the timecode calculator & frame rate converter for video editors and post-production teams. Made by an editor, for editors. Whether you're calculating durations, spotting VFX shots, converting frame rates for delivery, or totalling segments for a programme run time — PostCode handles the maths so you can handle the edit. • Calculator Add, subtract, multiply, and divide timecode. Your history is kept on the paper tape. Tap any line on the tape to drop its value back into the input. Touch and hold any line to copy or delete it. Supports negative values for pre-roll calculations. • Total Run Time Enter the In and Out points for multiple segments to calculate the total run time — like a simplified EDL. Reorder segments with drag-and-drop. Give segments an optional name. Set a target to see how far over or under you are. • Frame Rate Converter Convert timecode between any two frame rates instantly. Supports Drop Frame and Non-drop Frame, plus NTSC pull down. • TC/FR Toggle between timecode or frame count, anywhere in the app — perfect for VFX and animation workflows. • Frame Rates Supports all SMPTE standard frame rates — 23.976, 24, 25, 29.97 Non-drop Frame, 29.97 Drop Frame, 30, 50, 59.94 Non-drop Frame, 59.94 Drop Frame, 60 — as well as custom frame rates. • Undo Each mode keeps its own undo history. Shake your iPhone or press ⌘-Z to undo any destructive action. • Copy and Paste Touch and hold any value to copy and paste it as timecode or as frames. PostCode automatically validates and formats the timecode for you. • Built for Pros Hardware keyboard support on iPad and Mac. Dark mode optimised for edit suites and control rooms. Export calculations as TXT or CSV. If PostCode has helped you, an App Store rating and review would be appreciated. Happy editing!
Html Preview
Quickly view any HTML file on your iPhone or iPad. Share files from any app or browse your device to instantly render web pages, AI reports, or email attachments. Enjoy a private, ad-free experience with a history of your viewed files.
- Share Extension for instant previews
- Zero-delay instant rendering
- History with source app tracking
- Support for multiple encodings
- Dark Mode support
- File picker for local browsing
- Privacy-focused, no ads or analytics
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Open any HTML file on your iPhone in seconds. Html Preview is the simplest way to view HTML files shared from any app. Whether it's a report from ChatGPT, a page saved from Safari, or an attachment from WeChat — just tap Share and preview it instantly. KEY FEATURES • Share Extension — Open HTML files directly from any app using the iOS Share Sheet • Instant Rendering — Pre-warmed WebView engine loads content with zero delay • History — Recent files with source app tracking (knows if it came from WeChat, ChatGPT, Mail, etc.) • Multiple Encodings — Supports UTF-8, Windows-1252, and ISO Latin-1 • Dark Mode — Beautiful warm UI that adapts to your system appearance • File Picker — Browse and open HTML files from the Files app • Privacy First — No ads, no analytics, no data collection. Everything stays on your device. PERFECT FOR • Viewing HTML reports generated by AI assistants (ChatGPT, Claude, Gemini) • Previewing web pages shared via messaging apps (WeChat, Telegram, WhatsApp) • Opening HTML email attachments • Checking HTML files from cloud storage (iCloud, Google Drive, Dropbox) • Developers previewing HTML mockups on mobile Html Preview supports .html, .htm, and .xhtml files.
Screenshots
Verdict
The clearest difference is rating: PostCode at 5.0 against Html Preview's 4.7. PostCode also leads on review sentiment (100% vs 88%). Html Preview's advantage is update cadence (every 6 days vs every 3 weeks) and ratings volume (11 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
PostCode costs $2.99 and Html Preview $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PostCode holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Html Preview has 11 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of PostCode's written reviews are positive against 88% of Html Preview's.
PostCode ships an update every 3 weeks, Html Preview every 6 days. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.
| Parameter | PostCode | Html Preview |
|---|---|---|
| Price | $2.99 | $2.99 |
| Rating | 5.0 (1 ratings) — better | 4.7 (11 ratings) |
| Positive reviews | 100.0% of reviews — better | 87.5% of reviews |
| Number of ratings | 1 | 11 — better |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #172 — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Martin McLean | CyberGame Limited |
Customer experience
PostCode
Html Preview
In-app purchases
PostCode
No in-app purchases
Html Preview
No in-app purchases









