CPI pro vs Arc Calculator Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CPI pro
This utility app allows users to measure distances and sketch floor plans. It can mark dimensions on photos, record data in spreadsheets, and export drawings as photos or PDFs for easy sharing.
- Distance measurement
- Floor plan sketching
- Marking distances on photos
- Data recording in Excel
- Export as photo and PDF
- Sharing functionality
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1. This is an App for Distance Meter 2. It has functions such as sketching up a floor plan, marking distance on onsite photo, recording data in Excel. 3. It exports the drawing as photo, and PDF documents, and share with others.
Arc Calculator Pro
This utility app provides precise calculations for various arc measurements, including length, angle, radius, and area. It supports both millimeters and inches, making it ideal for fabrication and engineering tasks. The app is designed for high performance and offline use.
- Arc Length Calculation
- Arc Angle Calculation
- Arc Radius Calculation
- Arc Segment Area Calculation
- Arc Sector Area Calculation
- Supports mm and inches
- Offline functionality
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Arc Calculator is a professional engineering utility for calculating arc and circle geometry commonly used in fabrication, machining, engineering drawings, layout development, and workshop calculations. The app provides fast and accurate calculations for arc length, radius, angle, chord, sagitta, tangent height, segment area, and sector area using standard geometric formulas. Designed for engineers, fabricators, draftsmen, machinists, technicians, and students, Arc Calculator helps simplify everyday geometry calculations used for marking, layout, design verification, and fabrication work. App features: 1. No Internet Requirement. 2. No Irritating Ads. 3. Fabrication-friendly. 4. Higher Performance. Available Calculations • Arc Length • Arc Radius • Arc Angle • Arc Chord Length • Arc Depth / Sagitta • Arc Tangent Height • Arc Segment Area • Arc Sector Area Arc Length Calculator Calculate the length of an arc using the required radius and arc angle. Arc Radius Calculator Determine the radius of an arc from the available geometric dimensions. Arc Angle Calculator Calculate the included angle of an arc using the required arc dimensions. Arc Chord Calculator Calculate the straight-line chord length between the two endpoints of an arc. Arc Depth / Sagitta Calculator Calculate arc depth, also known as sagitta, for practical layout and fabrication applications. Arc Tangent Height Calculator Calculate tangent-related arc dimensions useful for fabrication marking and geometry calculations. Arc Segment Area Calculate the area enclosed by an arc and its corresponding chord. Arc Sector Area Calculate the area of a circular sector using the required radius and angle. Features • Multiple arc and circle geometry calculators • Accurate engineering formulas • Arc length and radius calculations • Arc angle and chord calculations • Sagitta / arc depth calculation • Tangent height calculation • Segment area calculation • Sector area calculation • Metric and Imperial unit support • Automatic unit conversion • Clear and easy-to-read results • Fast calculations • Simple professional interface • Works completely offline • No internet connection required Applications Arc Calculator is useful for: • Fabrication Layout and Marking • Sheet Metal Fabrication • Pressure Vessel Fabrication • Heat Exchanger Fabrication • Piping and Process Equipment • Engineering Drawings • Mechanical Engineering • Machining and Workshop Calculations • Industrial Layout Development • Design Verification Designed For • Mechanical Engineers • Fabrication Engineers • Design Engineers • Production Engineers • Draftsmen • Machinists • Workshop Technicians • Fabricators • Engineering Students Arc Calculator helps eliminate repetitive manual geometry calculations and provides quick, reliable results for practical engineering and fabrication work. Whether you are determining an arc length, finding a radius, calculating a chord or sagitta, checking an angle, or determining segment and sector areas, Arc Calculator provides a convenient geometry tool for everyday workshop and engineering applications.
Screenshots
Verdict
The clearest difference is price: CPI pro at Free against Arc Calculator Pro's $3.99. CPI pro also leads on update cadence (every 3 weeks vs every 41 months) and iOS requirement (8.0 vs 16.1). On review sentiment, 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
CPI pro is free to download; Arc Calculator Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CPI pro ships an update every 3 weeks, Arc Calculator Pro every 41 months. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.
| Parameter | CPI pro | Arc Calculator Pro |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 1.0 (1 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 weeks — better | Every 41 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.1 |
| Further details — not scored | ||
| Size | 135 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | SHENZHEN MILESEEY TECHNOLOGY CO.LTD | Imran Pinjara |
Customer experience
CPI pro
Arc Calculator Pro
In-app purchases
CPI pro
No in-app purchases
Arc Calculator Pro
No in-app purchases
Questions
Is CPI pro free?
Is Arc Calculator Pro free?
Do CPI pro or Arc Calculator Pro have ads?
Which is updated more often, CPI pro or Arc Calculator Pro?
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