Web Inspector vs Hairspring
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Web Inspector
Inspect and share HTML, CSS, and JavaScript source code from mobile web pages directly on your device. Debug web applications by viewing source code as a real mobile browser would.
- Inspect HTML tags
- View CSS code
- Extract JavaScript
- Share source code
- Debug mobile web apps
- Simulate mobile browser
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Web Inspector allow you to retrieve (and share) html tags, css and javascript code (isource) from web page particularly mobile page (iPad and iPhone) directly from your mobile Debug your webapp to inspect the source as a real mobile device browser
Hairspring
This app analyzes mechanical watches, measuring rate, beat error, and amplitude. It provides detailed reports, compares measurements, and offers guidance for accurate readings. The app is designed for privacy and includes all features with a single purchase.
- Measures rate, beat error, and amplitude
- Compares multiple measurements for accuracy
- Generates PDF measurement reports
- Automatic detection of common beat rates
- Live timing graph and six-position measurements
- Privacy-focused with on-device analysis
- Visual setup guide and signal-path coaching
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Hairspring is a serious iPhone timegrapher for mechanical watches. It measures rate, beat error, and amplitude — and tells you when the signal cannot support a trustworthy answer. MEASURE TWICE, SEE IF THEY AGREE A single number is not proof. Measure the same watch again and Hairspring compares the two runs, includes the statistical uncertainty of each rate, and states whether the readings agree. Save the verification in History and its PDF report. WHAT IT REPORTS • Rate in seconds per day, with statistical fit uncertainty • Automatic detection of common beat rates from 14,400 to 36,000 bph • Beat error from the escapement's high-frequency signature • Live amplitude as a range, reflecting what an acoustic measurement supports • Live timing graph and six-position measurements • Local history, drift and session comparisons • PDF measurement receipts for sharing with a watchmaker BUILT TO WITHHOLD BAD DATA Too much scatter, an implausible result, or timing too disturbed to number the beats produces a clear explanation and a suggested fix — not a plausible-looking number. The analysis band was chosen by a pre-registered experiment whose acceptance criteria were written before the data was collected; the first failed attempt remains documented. ONE PURCHASE, NO SUBSCRIPTION Everything is included with your purchase: every measurement, position run, history entry, comparison, PDF report, and optional raw capture. No subscription, no in-app purchase, no account, no sign-in, no ads, and no analytics. PRIVATE BY DESIGN Live audio is analyzed on your iPhone and is never uploaded automatically. Raw capture is off by default; if you enable it for diagnostics, the file stays on your device unless you explicitly export it. SETUP MATTERS Place the watch beside the phone — never on it — on a hard surface near the bottom microphone. Hairspring includes a visual setup guide and live signal-path coaching so you can see what needs attention. Requires a mechanical, not quartz, watch. Rate is what a phone microphone measures best; amplitude and beat error are reported with their limits stated.
Screenshots
Verdict
The clearest difference is price: Web Inspector at Free against Hairspring's $9.99. Web Inspector also leads on ratings volume (30 vs 2) and device support (3 vs 1). Hairspring's advantage is rating (5.0 vs 2.9) and ads (none vs shown). On in-app purchases 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
Web Inspector is free to download; Hairspring costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hairspring holds the better App Store score, 5.0 against 2.9. That said, the two scores are not equally well evidenced: Web Inspector has 30 ratings behind it against 2, so its average is the more settled of the two.
Web Inspector ships an update every 22 months, Hairspring every 5 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.
| Parameter | Web Inspector | Hairspring |
|---|---|---|
| Price | Free — better | $9.99 |
| Rating | 2.9 (30 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 56.3% of reviews | — |
| Number of ratings | 30 — better | 2 |
| Update frequency | Every 22 months | Every 5 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 18 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | JB STEVENARD | Marat Oganesyan |
Customer experience
Web Inspector
Hairspring
In-app purchases
Web Inspector
No in-app purchases
Hairspring
No in-app purchases
Questions
Is Web Inspector free?
Is Hairspring free?
Which has better reviews, Web Inspector or Hairspring?
Do Web Inspector or Hairspring have ads?
Which is updated more often, Web Inspector or Hairspring?
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