Comparison

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.

Head to head
About

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.

Highlights
  • Pre-built calculator formulas
  • Popular optical calculations
  • Quick access tools
  • Designed for engineers
  • Useful for students
Features
Read full description

Contains pre-built calculator formulas for the popular optical calculations

About

Data Center Engineer Toolkit

Features
Read full description

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

Wavelength Optics Calculator3 screens
Data Center Engineer Toolkit3 screens

Verdict

The call

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences ยท 5 level
Wavelength Optics Calculator versus Data Center Engineer Toolkit: the parameters behind the verdict, then further details
ParameterWavelength Optics CalculatorData Center Engineer Toolkit
PriceFreeFree
Positive reviews0.0% of reviewsโ€”
Update frequencyMonthlyEvery 2 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS12.0 โ€” better17.0
Further details โ€” not scored
Size30 MB1 MB
Age rating4+4+
DeveloperWAVELENGTH OPTO-ELECTRONIC (S) PTE. LTD.Shanghai Sheyuan Network Technology Co., Ltd.

In-app purchases

None

Wavelength Optics Calculator

No in-app purchases

1 purchases

Data Center Engineer Toolkit

One-time1
  • Unlock All Calculators$12.99

Questions

Is Wavelength Optics Calculator free?
Wavelength Optics Calculator is free to download, with no in-app purchases.
Is Data Center Engineer Toolkit free?
Data Center Engineer Toolkit is free to download, with in-app purchases available.
Do Wavelength Optics Calculator or Data Center Engineer Toolkit have ads?
Neither Wavelength Optics Calculator nor Data Center Engineer Toolkit shows ads.
Which is updated more often, Wavelength Optics Calculator or Data Center Engineer Toolkit?
Wavelength Optics Calculator ships an update monthly, and Data Center Engineer Toolkit every 2 days. Most recently, Wavelength Optics Calculator was updated on November 3, 2026 and Data Center Engineer Toolkit on October 31, 2026.

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