i vs CalcEngineer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i
This app guides users through routine operations for a specific hydroponic system. It offers growing guides, scheduling, fertilization advice, record-keeping, and troubleshooting to support daily, weekly, and periodic tasks. It's designed for owners of the TAPKIT system.
- Growing guides
- Scheduling and notifications
- Fertilization advice
- Record keeping and analysis
- Troubleshooting system
- Instructional videos
- Real-time sensor alerts
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i-Droponics is your day to day escort for the routine operations in the TAPKIT. i-Droponics includes growing guides, schedule, fertilization, records and analysis and advanced trouble shooting system. i-Droponics will support your daily, weekly and periodically routine so you will never forget to seed, harvest, clean & and more. This app design for TAPKIT oweners. The i-Droponics app lets TAPKIT growers access support for their crops from their pockets 24/7. The app provides crop advice on specific climate conditions, seeding planning, fertilizer formulae adjusted for conditions at the growing site, troubleshooting, and a library of informational FAQs. Also included are the complete operating manual, instructional videos for each step of production, and scheduling/notifications for all daily/weekly/monthly routines. On-site sensors provide real-time alerts.
CalcEngineer
This app provides professional engineering calculations for compressed air systems. It helps engineers and technicians determine CFM requirements, size compressors and tanks, and analyze pressure drops for optimized pneumatic systems.
- CFM Calculator
- Compressor & Tank Sizing
- Pressure Drop Analysis
- Flow Velocity & Pipe Sizing
- Multiple CFM Entries
- General Engineering Calculator Suite
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CalcEngineer - Professional Engineering Calculators The ultimate compressed air system calculator for engineers, technicians, and professionals. Calculate CFM requirements, size compressors and tanks, analyze pressure drops, and optimize your pneumatic systems with engineering-grade precision. KEY FEATURES: • CFM Calculator - Air actuator airflow calculations with real-time results • Compressor Sizing - Size compressors for your specific air demands • Tank Sizing - Calculate air receiver tank requirements and capacity • Pressure Drop Analysis - Determine pressure loss in pipes and fittings • Flow Velocity Calculator - Calculate fluid velocity for optimal system design • Pipe Sizing - Optimize pipe diameter selection for efficiency • Multiple CFM Entries - Add multiple air demands for complex systems • Engineering Calculator Suite - Additional tools for mechanical, electrical, chemical, and thermal engineering PROFESSIONAL TOOLS: • Real-time calculations using industry-standard formulas • Pre-filled values that transfer between calculators • Imperial and metric unit support with automatic conversion • Engineering-grade accuracy for professional applications • Clean, intuitive interface designed for daily use PERFECT FOR: • Industrial engineers and maintenance teams • System designers and consultants • Engineering students and educators • Manufacturing and facility managers • HVAC professionals and technicians Built by Justin Bush | JB CRE8IV - Professional engineering calculation solutions.
Screenshots
Verdict
The clearest difference is update cadence: CalcEngineer at every 2 days against i's every 6 months. i's advantage is iOS requirement (11.0 vs 17). 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for i against 5.0 for CalcEngineer. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
i ships an update every 6 months, CalcEngineer every 2 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.
| Parameter | i | CalcEngineer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 6 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 17 |
| Further details — not scored | ||
| Size | 90 MB | 10 MB |
| Age rating | 4+ | 9+ |
| Developer | Linnkr Inc. | Justin Bush |
Customer experience
i
CalcEngineer
In-app purchases
i
No in-app purchases
CalcEngineer
No in-app purchases
