Optical Surface Recognition vs Coil Toolkit Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Optical Surface Recognition
This utility app uses computer vision to scan surfaces for signs of corrosion on various metal types. It allows users to capture photos and record videos of detected corrosion, saving them with a proprietary score.
- Detects corrosion on various metal surfaces
- Scans flat metal, nails, bolts, signs, poles, grates
- Captures photos with corrosion score
- Records videos with corrosion score
- Saves media to device photo roll
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Optical Surface Recognition (OSR) is a unique technology which can scan surfaces for signs of surface degradation (corrosion). It can also detect corrosion on almost any type of metal, including exposed flat metal, nails, bolts, signs, poles, and grates. PHOTOS Capture photos of corrosion and save to your device's photo roll along with the OSR corrosion score in a custom generated image. VIDEOS Record entire videos with the proprietary OSR corrosion score and save them to your photo roll.
Coil Toolkit Pro
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Coil Calculator is a powerful and easy-to-use inductance calculator designed for engineers, electronics hobbyists, HAM radio operators, students, and DIY enthusiasts. Quickly calculate the inductance, number of turns, wire length, coil dimensions, and other essential parameters for a wide variety of coil types. Whether you're designing RF circuits, audio crossovers, wireless power systems, or custom inductors, Coil Calculator helps you achieve accurate results in seconds. Key Features: • Single-Layer Air Core Coil Calculator • Multi-Layer Air Core Coil Calculator • Ferrite Toroid Inductor Calculator • Ferrite Choke Calculator • Flat Spiral Coil Calculator • PCB Coil Calculator • Inductance and Turns Calculation • Wire Length and Coil Dimension Estimation • Fast, Accurate, and Easy-to-Use Interface • Ideal for RF, Audio, Electronics, and DIY Projects • Works Offline – No Internet Required Perfect For: • HAM Radio Operators • Electronics Engineers • Electrical Engineering Students • Audio Enthusiasts • Makers and DIY Builders • Circuit Designers and Hobbyists Whether you need to calculate the required turns for a target inductance or determine the inductance of an existing coil, Coil Calculator provides reliable results to simplify your design process. Download Coil Calculator today and build better inductors with confidence.
Screenshots
Verdict
Optical Surface Recognition and Coil Toolkit Pro are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Optical Surface Recognition | Coil Toolkit Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 17 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Engineering Director, Inc. | Mamta Kevadiya |
In-app purchases
Optical Surface Recognition
No in-app purchases
Coil Toolkit Pro
No in-app purchases
Questions
Is Optical Surface Recognition free?
Is Coil Toolkit Pro free?
Do Optical Surface Recognition or Coil Toolkit Pro have ads?
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