Comparison

TBD vs Pipe Pressure drop calculator

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

Head to head
About

TBD

Features
Read full description

TBD-flowmeter is a companion software that monitors your daily water equipment, giving you a clear picture of your water usage; and a smarter way to track and reduce water usage based on your water bill

About

Pipe Pressure drop calculator

Features
Read full description

Easily calculate pipe pressure drop, friction loss, and liquid velocity using the Darcy–Weisbach equation. This app is designed for engineers, plumbers, HVAC designers, and fluid mechanics students who need fast and accurate results for fluid flow in pipes. Features : - Choose from 76 pipe materials (steel, copper, PVC, and more) - Select from 58 types of liquids (water, oil, chemicals, etc.) - Pipe diameters up to 84 inches (2100 mm) supported - Calculate pressure loss, velocity, and head loss in seconds - Useful for pipeline design, hydraulic systems, and industrial applications Whether you’re working on plumbing design, HVAC systems, industrial pipelines, or academic projects, this app gives you a reliable way to calculate fluid flow and optimize your designs. Download now and make pipe pressure loss calculations faster, easier, and more accurate. In-app purchase Details: Lifetime Access for ads free version Privacy Policy : https://applicationcontent.wordpress.com/privacy-policy/ Terms of use : https://applicationcontent.wordpress.com/terms-of-use/

Screenshots

TBD3 screens
Pipe Pressure drop calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: TBD at none against Pipe Pressure drop calculator's 1. TBD also leads on update cadence (every 5 weeks vs every 3 months). On price, ads, device support and iOS requirement 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

Both are free to download. Pipe Pressure drop calculator sells 1 one-off in-app purchase. TBD asks for nothing beyond the download.

UpkeepUpdate frequency

TBD ships an update every 5 weeks, Pipe Pressure drop calculator every 3 months. The most recent releases landed on October 8, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 4 level
TBD versus Pipe Pressure drop calculator: the parameters behind the verdict, then further details
ParameterTBDPipe Pressure drop calculator
PriceFreeFree
Update frequencyEvery 5 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS13.013.0
Further details — not scored
Size19 MB61 MB
Age rating4+4+
DeveloperHangzhou Dashi Wisdom Technology Co., Ltd.Ashvin Kevadiya

In-app purchases

None

TBD

No in-app purchases

1 purchases

Pipe Pressure drop calculator

One-time1
  • Lifetime Premium$7.99

Questions

Is TBD free?
TBD is free to download, with no in-app purchases.
Is Pipe Pressure drop calculator free?
Pipe Pressure drop calculator is free to download, with in-app purchases available.
Do TBD or Pipe Pressure drop calculator have ads?
Neither TBD nor Pipe Pressure drop calculator shows ads.
Which is updated more often, TBD or Pipe Pressure drop calculator?
TBD ships an update every 5 weeks, and Pipe Pressure drop calculator every 3 months. Most recently, TBD was updated on October 8, 2026 and Pipe Pressure drop calculator on October 10, 2026.

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