IO vs Conduit Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
IO
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Forget paper checklists. Check I/Os directly on the machine – where sensors and actuators are located. IO-INSPECTOR is an independent third-party tool for commissioning and functional testing in industrial automation environments. With your iPad or iPhone you can observe, document and - if approved, technically permissible and safety-compliant - switch/control signals on site. Less shouting in the workshop, less manual checking and more clarity right where the work takes place. WHY IO-INSPECTOR? • Project and variable import (for TIA Portal® projects): Import variable lists from common export formats (e.g. .xlsx or .csv). IO-INSPECTOR adopts the structure, data types and comments from the file provided - manual re-entry is not necessary. • HMI View Smart Connector: Quickly connect to your system and conveniently access information relevant to commissioning. The Smart Connector is intended to simplify connection and access to the required displays/views in practice - without having to imply an official manufacturer affiliation. • Fast system connection: Detect and connect devices in the local network quickly and clearly. • Live status and targeted control (OPC UA): Connect to compatible controllers via OPC UA and check signals in real time. • Observe: Track changes immediately. OPC is also accessible via the WebSocket protocol. • Control: Set outputs or markers specifically (Force/Modify), provided this is activated in the environment and meets the safety requirements. • Diagnostics: Identify problems more quickly, such as cabling or logic problems. • Digital documentation (PDF): Check off test steps digitally, add notes (e.g. “Sensor defective”, “Adjustment required”) and export a PDF report with your company logo and timestamp. • Filter and search: Filter by status (“Open”, “Done”) or search directly by symbol name. • Mark changes (round-trip support): Mark typos or name adjustments in the app so that you can later apply them in your engineering project in a controlled manner. • Share and collaborate on projects: Share projects so colleagues can continue with the same project status - including testing status and documentation progress (depending on the sharing/export method chosen). TECHNICAL NOTES/REQUIREMENTS • Compatibility: Developed for environments with SIMATIC® S7-1200 (FW 4.0+) and SIMATIC® S7-1500. • OPC UA: OPC UA must be activated on the CPU. Basic access may not require an additional license depending on your configuration; Actual requirements depend on device, firmware and project configuration. • Signals: Supports digital and analog signals (depending on project/export data and target system). • Network/Offline: Use in the machine's local WLAN; Project-related features can also be available without the Internet (depending on the scope of functions). PRICES • Download IO-INSPECTOR for free to create projects and use network scanning. Upgrade options are available for extended functions (e.g. project import, HMI write access (power tags), PDF export, OPC interface, HMI Smart Connector). • Download IO-INSPECTOR and simplify commissioning. Legal notice/trademark: IO-INSPECTOR is an independent third-party software. SIMATIC®, TIA Portal®, S7® as well as S7-1200 and S7-1500 are trademarks of Siemens AG. This app has no business relationship with Siemens AG and is not developed, supported or distributed by Siemens. All product and company names are used solely to describe compatibility and belong to their respective owners.
Conduit Pro
This app provides electricians with a comprehensive suite of tools for conduit bending, fill calculations, and wire pull analysis. It offers multiple bend calculators, real bender profiles, and NEC compliance checks. Designed for field use, it functions offline and allows for saving and exporting job data.
- 9 bend calculators
- 59+ real bender profiles
- NEC conduit fill checker
- Wire pull tension analysis
- Offline functionality
- Job saving and export
- Training mode
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ConduitPro is the only conduit app that combines all 9 bend calculators, NEC conduit fill checks, wire pull tension analysis, and 59+ real bender profiles in one tool — built for electricians, from apprentices learning their first offset to journeymen running complex conduit paths. START FREE Get started with 90° and Offset calculators, generic bender profiles, reference cards, and training — no payment required. UNLOCK PRO Subscribe to Pro for full access to every tool in ConduitPro: ALL 9 BEND CALCULATORS Every bend type you'll encounter in the field: - Offset bends - 90° bends - Back-to-back bends - Rolling offsets - 3-point saddles - 4-point saddles - Kicked 90s - Compound 90s - Segmented bends 59+ REAL BENDER PROFILES Profiles from 9 manufacturers: Ideal, Klein, Greenlee, Gardner Bender, Milwaukee, Southwire, RIDGID, Rack-A-Tiers, and generic benders. Hand benders, electric, hydraulic, and mechanical — select your exact bender and get accurate take-up, deduct, and multiplier values. Calibrate your own bender with the built-in 5-step wizard. Filter by type or favorites, and quickly find recently used benders. NEC CONDUIT FILL CALCULATOR Instantly check if your wire pull meets NEC Chapter 9 fill requirements. Mix wire types and gauges, see fill percentage with a visual cross-section, and know before you pull. WIRE PULL TENSION CALCULATOR Calculate pulling tension for straight runs and bends using the Capstan equation. See tension at every point along the run, check against sidewall bearing pressure limits, and get pull recommendations. TRAINING MODE Step-by-step lessons teach you how to lay out and execute each bend type. Perfect for apprentices studying for their journeyman exam. Volume pricing available for schools and trade programs through Apple School Manager. BUILT FOR THE FIELD - Works completely offline — no signal required - Save and organize calculation runs by job - Export results as images, PDFs, or text - Undo/redo for quick what-if adjustments - Home screen widgets for quick reference - Reference cards with multiplier tables, shrink values, and NEC fill rules SUBSCRIPTION DETAILS ConduitPro Pro is available as a monthly ($1.99/month) or annual ($12.99/year) auto-renewing subscription. Payment is charged to your Apple ID account at confirmation of purchase. The subscription automatically renews unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to Settings > Apple ID > Subscriptions. Terms of Use: https://mccabe1097.github.io/conduitPro-privacy/ Privacy Policy: https://mccabe1097.github.io/conduitPro-privacy/
Screenshots
Verdict
The clearest difference is iOS requirement: IO at 17.6 against Conduit Pro's 26.2. On price, update cadence, ads 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. IO sells 1 one-off in-app purchase and Conduit Pro sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.
IO ships an update every 2 weeks, Conduit Pro fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.
| Parameter | IO | Conduit Pro |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 15 MB | 12 MB |
| Age rating | +4 | 4+ |
| Developer | CJ Solution UG (haftungsbeschraenkt) | Kyle McCabe |
In-app purchases
IO
- Pro Version Lifetime$17.99
Conduit Pro
- Pro Monthly$1.991 Month
- Pro Annual$12.991 Year









