Comparison

HydroCalc Plus vs C6协同v3.9

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HydroCalc Plus

A professional tool for hydraulic engineers to calculate pressure losses in piping systems. It supports US and SI units, offers an extensive pipe material and fittings database, and includes inverse calculations for design optimization.

Highlights
  • Friction head loss calculation (Hazen-Williams)
  • US and SI unit support
  • Extensive pipe material library
  • Fittings and valves database
  • Inverse calculation mode
  • Real-time results (velocity, losses)
Features
Read full description

Professional hydraulic engineering tool for calculating pressure losses in piping systems. Essential for engineers, plumbers, and contractors designing water distribution networks. Key Features: Calculate friction head losses using industry-standard Hazen-Williams equation Support for both US (ft, gpm, psi) and SI (m, lps, bar) units Extensive pipe material library with pre-defined roughness coefficients (C-factors) Complete fittings and valves database including elbows, tees, valves, contractions, and expansions Inverse calculations to determine optimal pipe diameter, flow rate, or length for target head loss Real-time results showing velocity, friction loss, minor losses, and total system head loss What Sets Pro Apart: Unlike basic calculators, HydroCalc Pro accounts for both major losses (pipe friction) and minor losses (fittings and valves). The app includes a comprehensive database of K-factors for various components, allowing accurate total system pressure loss calculations. Perfect For: Water supply system design Irrigation network planning HVAC piping calculations Fire protection systems Industrial fluid transport Educational purposes in hydraulic engineering Technical Capabilities: The app considers all critical factors affecting pressure loss: flow velocity, pipe diameter, internal roughness, pipe length, and fitting configurations. Materials include PVC, polyethylene, steel, cast iron, concrete, and more with accurate C-factors ranging from 120-150. Inverse Calculation Mode: Unique feature allowing backward calculations - determine required pipe size for allowable head loss, maximum flow capacity, or optimal pipe length for your system constraints. Simple, intuitive interface with instant results. No internet connection required. Professional-grade calculations in your pocket. Note: Premium modules are available in English and Spanish.

About

C6协同v3.9

Features
Read full description

C6协同v3.9客户端是金和软件股份有限公司开发的面向C6V3.0(协同平台套件系统), 解决企业中对于移动办公有高要求和需求量大的问题, 提供卓越用户体验和高效率的移动办公解决方案。 C6客户端依托于C6V3.0(协同平台套件系统)的优势, 结合手机平台特性, 致力于解决企业移动办公的问题, 将企业办公进入到一种随时随地分享, 随时随地操作, 随时随地能看到反馈的工作氛围。 请注意,此应用是作为C6V3.0产品的移动终端功能模块

Screenshots

HydroCalc Plus4 screens
C6协同v3.94 screens

Verdict

The call

The clearest difference is price: C6协同v3.9 at Free against HydroCalc Plus's $3.99. C6协同v3.9 also leads on in-app purchases (none vs 4) and iOS requirement (7.0 vs 15.1). On update cadence, ads and device support 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

CostPrice · In-app purchases · Ads · Monetization

C6协同v3.9 is free to download; HydroCalc Plus costs $3.99 up front. HydroCalc Plus sells 4 one-off in-app purchases. C6协同v3.9 asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on August 31, 2026 and September 17, 2026 respectively.

Scorecard3 real differences · 7 level
HydroCalc Plus versus C6协同v3.9: the parameters behind the verdict, then further details
ParameterHydroCalc PlusC6协同v3.9
Price$3.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.17.0 — better
Further details — not scored
Size34 MB21 MB
Age rating4+4+
DeveloperTransparent Blue Water LLCBEIJING JINHER SOFTWARE CO.LTD.

In-app purchases

4 purchases

HydroCalc Plus

One-time4
  • Pump Power Calculator$1.99
  • System Curve Generator$1.99
  • Pipe Database$1.99
Show 1 more
  • Industrial Fluids Pack$2.99
None

C6协同v3.9

No in-app purchases

Questions

Is HydroCalc Plus free?
HydroCalc Plus costs $3.99, and also offers in-app purchases.
Is C6协同v3.9 free?
C6协同v3.9 is free to download, with no in-app purchases.
Do HydroCalc Plus or C6协同v3.9 have ads?
Neither HydroCalc Plus nor C6协同v3.9 shows ads.
Which is updated more often, HydroCalc Plus or C6协同v3.9?
HydroCalc Plus ships an update every 3 weeks, and C6协同v3.9 every 3 weeks. Most recently, HydroCalc Plus was updated on August 31, 2026 and C6协同v3.9 on September 17, 2026.

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