Comparison

CircuitShepherd vs O

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CircuitShepherd

Automate electronic circuit design with AI-driven parameter optimization. Define schematics and design goals, and the software finds optimal part values in real-time. Save time on calculations and iterations with this intuitive tool.

Highlights
  • Automated parameter optimization
  • AI-driven circuit engineering
  • Real-time design goal finding
  • Intuitive user interface
  • Schematic definition
  • Part value calculation
Read full description

CircuitShepherd provides you with analog-design superpowers by doing automated parameter optimization it in realtime! It's a novel Electronic Design Automation software for AI driven electronics circuit engineering. You define an arbitrary schematic including specific design goals and CircuitShepherd will find the right part values for you. This is achieved by combining traditional circuit simulation techniques with AI driven parameter estimation algorithms and finally a simple and intuitive user interface. It’s easy to learn, fast to use and it will save you a lot of time by automating your daily calculation and iteration tasks. CircuitShepherd is free to use immediately (with very basic features). The full version with all features enabled is available via in-app purchase (subscription-based). Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.circuitshepherd.com/privacy-policy-iOS.html

About

O

Features
Read full description

Transform Your O-Ring Measurement with AI Precision! Say goodbye to guesswork and inaccurate measurements. Our cutting-edge app uses advanced AI technology to determine the exact size of your O-rings with just a snap of a photo. Whether you’re a professional in the automotive, plumbing, or manufacturing industries, or a DIY enthusiast, our app is designed to make your life easier and your work more precise. Key Features: - Instant Measurements: Simply take a photo of your O-ring, and let our AI do the rest. Get precise measurements in seconds without any hassle. - High Accuracy: Our advanced AI algorithms ensure that you get the exact dimensions of your O-rings every time, eliminating the risk of errors. - User-Friendly Interface: The app is designed with a clean and intuitive interface, making it easy for anyone to use, regardless of technical expertise. - Versatile Application: Ideal for various industries, including automotive, plumbing, manufacturing, and more. Whether you need to measure O-rings for professional projects or home repairs, this app is your perfect companion. - Step-by-Step Guidance: Follow the simple instructions to ensure you capture the perfect photo for accurate measurements every time. Why Choose Our App? Our app leverages the latest in AI technology to bring you unparalleled accuracy and convenience. No more fumbling with manual tools or second-guessing your measurements. Just snap, measure, and get back to what you do best.

Screenshots

CircuitShepherd4 screens
O3 screens

Verdict

The call

The clearest difference is in-app purchases: O at none against CircuitShepherd's 1. CircuitShepherd's advantage is update cadence (every 3 weeks vs every 13 months) and device support (3 vs 1). On price and ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CircuitShepherd sells 1 in-app purchase, starting at $6.99 per month. O asks for nothing beyond the download.

UpkeepUpdate frequency

CircuitShepherd ships an update every 3 weeks, O every 13 months. The most recent releases landed on October 2, 2026 and September 13, 2026 respectively.

Scorecard4 real differences · 6 level
CircuitShepherd versus O: the parameters behind the verdict, then further details
ParameterCircuitShepherdO
PriceFreeFree
Rating1.5 (2 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 3 weeks — betterEvery 13 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS14.0 — better16.2
Further details — not scored
Size49 MB5 MB
Age rating4+4+
DeveloperJosef WoessAppBakkers BV

In-app purchases

1 purchases

CircuitShepherd

Subscriptions1
  • full version$6.991 Month
None

O

No in-app purchases

Questions

Is CircuitShepherd free?
CircuitShepherd is free to download, with in-app purchases available.
Is O free?
O is free to download, with no in-app purchases.
Do CircuitShepherd or O have ads?
Neither CircuitShepherd nor O shows ads.
Which is updated more often, CircuitShepherd or O?
CircuitShepherd ships an update every 3 weeks, and O every 13 months. Most recently, CircuitShepherd was updated on October 2, 2026 and O on September 13, 2026.

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