I/E Bible vs PLC Ninja
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
I/E Bible
This app provides a centralized hub for instrument calibration resources. It offers instant answers to process instrumentation questions through an integrated AI agent, streamlining calibration workflows.
- Instrument calibration resources
- AI agent for process instrumentation
- Instant answers to technical questions
- Streamlined calibration workflows
- Centralized resource hub
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Streamline your instrument calibration process with I/E Bible. Get all your calibration resources and get instant answers to your process instrumentation questions with our integrated AI agent. Oscar Corona/Jacob Yepez
PLC Ninja
Monitor live data from industrial controllers directly on your iPhone. Safely view inputs, outputs, timers, and analog values in real-time without altering PLC programs. Connect via Ethernet, Wi-Fi, or serial adapters for on-site diagnostics.
- Real-time PLC data monitoring
- Read-only safety design
- I/O card visualization with notes
- Tag, bit, word, and analog value monitoring
- Alarm and trend charts for analog values
- Drive status monitoring
- Multiple connection methods (Ethernet, Wi-Fi, Serial)
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PLC Ninja puts live PLC data on your iPhone. Connect over Ethernet, Wi-Fi, or a serial adapter, and watch inputs, outputs, timers, counters and analog values update in real time — standing at the panel, not walking back to the office. READ-ONLY BY DESIGN PLC Ninja reads and shows. It never changes the PLC program and never forces I/O, so it is safe to hand to any technician. When the logic has to change, your laptop and the PLC maker's software are still the tools for that. SEE I/O WHERE THE FAULT IS • I/O Cards: every module laid out by rack and slot, with your own notes on each point • Monitor: tags, bits, words and analog values, live • Sections: group the points for one station or one fault in a single view • Alarms and trend charts for analog values • Drives: speed, current and status at a glance CONNECT THE WAY THE MACHINE IS BUILT • Ethernet PLCs over plant Wi-Fi, a travel router, or a USB-C / Lightning to Ethernet adapter • Serial PLCs through a TCP/IP adapter such as PUSR USR-W610, PUSR USR-DR162 or Moxa NPort W2150A • Kit Router: one GL.iNet Opal (GL-SFT1200) — plus a Moxa NPort 5110A for serial PLCs — reaches Ethernet and serial machines from the same Wi-Fi, without changing any PLC address. PLC Ninja sets the router up from the iPhone. • PLC IP Detect finds PLCs and adapters on the network and fills in the new machine for you • Load an L5X, CSV or STEP 7 configuration for tag names, racks and descriptions SHARE WITH THE CREW • Print a Scan & Connect QR label for each machine: scan it, and the iPhone joins the Wi-Fi and connects • Share machine files by AirDrop, Messages or Mail SUPPORTED PLCs Allen-Bradley ControlLogix, CompactLogix, GuardLogix, Micro800, MicroLogix, SLC 500 and PLC-5; Siemens S7-1200, S7-1500, S7-300, S7-400, ET 200SP and LOGO!; Mitsubishi FX; AutomationDirect DirectLOGIC; Panasonic FP. The full list is in the app. TRY IT FREE The built-in Demo shows every feature with simulated data — no PLC needed, free on every plan. The Free edition includes a 14-day trial with one PLC (CPU rack digital I/O). SUBSCRIPTIONS Standard (up to 3 PLCs), Professional (up to 10 PLCs) and Ultimate (unlimited PLCs), billed monthly or yearly. Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple ID settings. PLC Ninja is an independent product and is not affiliated with, endorsed by, or sponsored by Rockwell Automation, Siemens AG, AutomationDirect, Mitsubishi Electric, Panasonic, Moxa, GL.iNet or PUSR. Allen-Bradley, ControlLogix, CompactLogix, GuardLogix, Micro800, MicroLogix, SLC 500, PLC-5, RSLogix and Studio 5000 are trademarks of Rockwell Automation. SIMATIC, S7, ET 200SP and LOGO! are trademarks of Siemens AG. DirectLOGIC is a trademark of AutomationDirect. MELSEC and FX are trademarks of Mitsubishi Electric. All other product names are trademarks of their respective owners and are used only to identify the equipment this app can connect to. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://plcninja-support.github.io/support/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: I/E Bible at none against PLC Ninja's 6. I/E Bible also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.6). On price, rating, ratings volume 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
Both are free to download. PLC Ninja sells 6 in-app purchases, starting at $3.99 per month. I/E Bible asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for I/E Bible against 5.0 for PLC Ninja. Both are backed by a comparable volume of ratings — 5 and 3 respectively.
| Parameter | I/E Bible | PLC Ninja |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (5 ratings) | 5.0 (3 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 5 — better | 3 |
| Update frequency | — | Monthly |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 198 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Oscar Corona | SHAOHUA YI |
Customer experience
I/E Bible
PLC Ninja
In-app purchases
I/E Bible
No in-app purchases
PLC Ninja
- Standard$3.991 Month
- Professional$8.991 Month
- Ultimate$14.991 Month
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- Standard$39.991 Year
- Professional$89.991 Year
- Ultimate$149.991 Year









