Wavelength Optics Calculator vs Data Center Engineer Toolkit
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Wavelength Optics Calculator
This utility app provides a collection of pre-built calculator formulas for common optical calculations. It's designed for quick and easy access to essential optical engineering tools.
- Pre-built calculator formulas
- Popular optical calculations
- Quick access tools
- Designed for engineers
- Useful for students
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Contains pre-built calculator formulas for the popular optical calculations
Data Center Engineer Toolkit
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Running a data center and need quick PUE analysis, cooling tonnage, or floor load checks on site? Tired of spreadsheets for PDU load balancing and cable sizing? This app puts 11 professional data center calculators in your pocket โ all offline, no subscription. FREE CALCULATORS: - PUE / DCiE Calculator: Power Usage Effectiveness and Data Center Infrastructure Efficiency with annual energy cost estimates - UPS Runtime: Battery backup runtime with inverter efficiency and power factor - Raised Floor Load & Tile Airflow: Floor tile bearing capacity check plus perforated tile CFM calculation for rack cooling adequacy PRO CALCULATORS (one-time $19.99 unlock): - Rack Heat & Cooling: Cooling tons, airflow CFM, and water flow GPM based on rack power and PUE - Rack Power Density: Amps per rack, power density in kW/m2, cable sizing, and breaker requirements - PDU Load Balance: Three-phase load balancing with imbalance percentage and per-phase capacity - CDU Flow Rate: Liquid cooling flow rate, pressure drop, and pump horsepower for water and glycol - DC Bus Voltage Drop: Cable sizing with voltage drop for copper and aluminum conductors - Breaker Derate Quick-Check: NEC temperature and conductor fill derating with selective coordination ratio check - Fiber Count Planner: Fiber optic cable count with patch panel and splice tray sizing - Fiber Pull Tension: Pulling tension, bend radius, and conduit fill ratio with pass/fail check REFERENCE TABLES (Pro): 42U rack specs, PUE benchmarks, cooling system comparison, wire ampacity, Uptime Institute Tier standards, and fiber optic specifications. Built for facility engineers, infrastructure designers, colocation operators, and data center technicians. All calculations offline. No account or login required.
Screenshots
Verdict
The clearest difference is in-app purchases: Wavelength Optics Calculator at none against Data Center Engineer Toolkit's 1. Wavelength Optics Calculator also leads on iOS requirement (12.0 vs 17.0). Data Center Engineer Toolkit's advantage is update cadence (every 2 days vs monthly). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Data Center Engineer Toolkit sells 1 one-off in-app purchase. Wavelength Optics Calculator asks for nothing beyond the download.
Wavelength Optics Calculator ships an update monthly, Data Center Engineer Toolkit every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Wavelength Optics Calculator | Data Center Engineer Toolkit |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | โ |
| Update frequency | Monthly | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Monetization | Free | โ |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 12.0 โ better | 17.0 |
| Further details โ not scored | ||
| Size | 30 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | WAVELENGTH OPTO-ELECTRONIC (S) PTE. LTD. | Shanghai Sheyuan Network Technology Co., Ltd. |
In-app purchases
Wavelength Optics Calculator
No in-app purchases
Data Center Engineer Toolkit
- Unlock All Calculators$12.99
Questions
Is Wavelength Optics Calculator free?
Is Data Center Engineer Toolkit free?
Do Wavelength Optics Calculator or Data Center Engineer Toolkit have ads?
Which is updated more often, Wavelength Optics Calculator or Data Center Engineer Toolkit?
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