Super Ruler vs Thread Gauge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Super Ruler
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Now you can Measure everything with beautiful on-screen ruler. A simple, user-friendly and accurate ruler for your phone -Caliper mode - Pick your units: mm, cm, inches, m, inch, foot, and yards - Control ruler length as you want, even you can put 100 meter if you want - no calibration needed - Copy current length to clipboard and paste it in another app - Save your current measurement screen as image - Very simple so everyone can use it
Thread Gauge
This app transforms your iPhone into a precise thread measurement tool. Simply photograph a screw next to a reference card to accurately determine its pitch and diameter, identifying the closest standard in both metric and imperial units.
- Measures metric and imperial threads
- Identifies closest standard match
- Uses reference card for scale
- On-screen guidance for photography
- Offline processing, no data tracking
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Thread Gauge turns your iPhone into a precision thread gauge. Photograph a screw next to a common reference card, and it measures the thread's pitch and diameter, then identifies the closest matching standard — in both metric and imperial. No calipers, no thread gauge set, no guesswork. Just a photo. HOW IT WORKS Lay the screw on a plain background, parallel to a reference card: a credit or ID card (85.6 mm) or a full-size SD card. Use the light intensity slider to apply enough light to minimize shadows around the screw. Use the bubble level to find the best lighting angle — a green dot inside the circle is ideal. Move your phone closer or farther to get the sharpest focus; the sharper the image, the more precise your measurement. Snap a photo or pick one from your library, choose which card you used, and tap Measure. ThreadGauge uses the card as a known scale to compute the real-world thread pitch and major diameter. It all runs on your device — no server, no account, no tracking. Nothing you photograph ever leaves your iPhone. WHAT IT IDENTIFIES - Metric coarse and fine (M-series) - Imperial UNC and UNF - Thread pitch (mm and TPI) and major diameter - The closest standard match, with a confidence indicator When two standards are nearly identical — for example, a #10-32 and M5×0.8 — Thread Gauge flags the ambiguity so you can confirm with a physical gauge instead of trusting a borderline read. FEATURES - Metric and imperial in one tool - Tap to look up any identified size online - On-screen guidance for lighting, angle, and framing - Made for makers, machinists, mechanics, and anyone holding a mystery bolt PRICING Your first 3 measurements are free. One simple in-app purchase unlocks unlimited measurements — no subscription, ever. PRIVACY Thread Gauge collects no personal data, and your photos stay on your device. Questions or feedback? Email imad.naqqash@gmail.com
Screenshots
Verdict
The clearest difference is ads: Thread Gauge at none against Super Ruler's shown. Thread Gauge also leads on update cadence (every 6 days vs every 109 months). Super Ruler's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 17.6). On price and 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Super Ruler ships an update every 109 months, Thread Gauge every 6 days. The most recent releases landed on September 15, 2026 and August 16, 2026 respectively.
| Parameter | Super Ruler | Thread Gauge |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 109 months | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 11.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Hany Elmehy | Imad Jawad |
In-app purchases
Super Ruler
No in-app purchases
Thread Gauge
No in-app purchases
Questions
Is Super Ruler free?
Is Thread Gauge free?
Do Super Ruler or Thread Gauge have ads?
Which is updated more often, Super Ruler or Thread Gauge?
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