TempoCalc vs Html Preview
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TempoCalc
Read full descriptionHide full description
TempoCalc converts tempo (BPM) to milliseconds for different note lengths—whole notes, quarters, eighths, triplets, and more. Essential for music producers and audio engineers setting delay times, LFO rates, reverb pre-delays, and syncing effects to tempo. It eliminates manual calculations, ensuring precise timing alignment across all rhythmic subdivisions. Perfect for electronic music production, MIDI programming, and any workflow requiring exact tempo-based timing measurements.
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
Read full descriptionHide full description
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 update cadence: TempoCalc at daily against Html Preview's every 6 days. TempoCalc also leads on price ($0.99 vs $2.99) and iOS requirement (15.1 vs 17.0). On ads, in-app purchases and device support 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
TempoCalc costs $0.99 and Html Preview $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TempoCalc ships an update daily, Html Preview every 6 days. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.
| Parameter | TempoCalc | Html Preview |
|---|---|---|
| Price | $0.99 — better | $2.99 |
| Rating | — | 4.7 (11 ratings) — better |
| Positive reviews | — | 87.5% of reviews |
| Number of ratings | — | 11 — better |
| Update frequency | Daily — better | Every 6 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 32 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Eric Cotrina | CyberGame Limited |
In-app purchases
TempoCalc
No in-app purchases
Html Preview
No in-app purchases









