Comparison

Heating Pipe Size vs Leadkit Inbox

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

Head to head
About

Heating Pipe Size

Features
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Estimate required pipe diameter of a closed hydronic heating or cooling system in an instant and calculate pressure drop to determine required circulation pump characteristics (flow and head). Easy to use, quick and accurate results. Enter the required heating or cooling output and water flow and return temperatures. Choose pipe material. The recommended pipe diameter is already there, presented as a standard DN. Additionally, choose the recommended or a custom pipe diameter and specify pipe section length and fittings. Results include water flow rate, velocity, pressure drop and pressure drop per 100 m of straight pipe and can be used to determine the parameters of a circulation pump. ## Features: - Simple to use; - Suitable for hydronic (water-based) heating and cooling systems; - Suitable for a large range of heating and cooling outputs; - Predefined pipe materials; - Water temperature range from 1 to 99 ΒΊC; - Completely independent from any manufacturers; - No login needed, no data connection needed; - No data collection; - No subscriptions, one-time purchase only; - Very quick calculation with no delays; ## Possible uses of the application: - Quickly estimate required pipe diameter when designing a hydronic (water-based) closed heating or cooling system. - Quickly determine circulation pump requirements (flow and head), whether it be a new system or a replacement pump. ## Notes: - It is recommended to calculate every section of the piping system separately and additionally check the whole system pressure drop. - The application is only useful for calculations of hydronic (water based) closed heating or cooling systems. Other systems and media are not supported. - Only metric units are supported. - The application, while accurate, is not meant as a complete replacement of specialized software for heating and cooling system design. The application doesn't require data connection. It doesn't require and doesn't collect any personal data. It also doesn't contain third-party ads or code. Also: no in-app purchases, no subscriptions.

About

Leadkit Inbox

Features
Read full description

Instead of handling leads across emails, spreadsheets or multiple tools, Leadkit Inbox brings everything together in one clear system. Get an instant overview of incoming leads, track their status, and make sure every opportunity is followed up properly. Whether you're in the office or on the move, Leadkit Inbox helps you stay organized and respond quickly when new leads arrive. Key features: Overview of all your leads Get a clear overview of all leads you receive from Nettbureau in one place. Track lead status Update lead status and follow the progress of each lead through your process. Assign leads to your team Easily assign leads to colleagues responsible for follow-up. Add notes and activities Keep track of each lead, next steps and important details. Monitor billing and invoices Access your invoices and keep track of billing status directly in the platform. Leadkit Inbox is designed to be simple, intuitive and easy to use. You’ll only be focused on what matters most: following up and closing deals.

Screenshots

Heating Pipe Size4 screens
Leadkit Inbox4 screens

Verdict

The call

The clearest difference is price: Leadkit Inbox at Free against Heating Pipe Size's $5.99. Leadkit Inbox also leads on update cadence (every 6 days vs every 15 months) and iOS requirement (16.4 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Leadkit Inbox is free to download; Heating Pipe Size costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Heating Pipe Size ships an update every 15 months, Leadkit Inbox every 6 days. The most recent releases landed on September 9, 2026 and September 22, 2026 respectively.

Scorecard3 real differences Β· 3 level
Heating Pipe Size versus Leadkit Inbox: the parameters behind the verdict, then further details
ParameterHeating Pipe SizeLeadkit Inbox
Price$5.99Free β€” better
Update frequencyEvery 15 monthsEvery 6 days β€” better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, Mac β€” betteriPhone, iPad
Requires iOS26.016.4 β€” better
Further details β€” not scored
Size1 MB60 MB
Age rating4+4+
DeveloperSebastjan ValicNettbureau AS

In-app purchases

None

Heating Pipe Size

No in-app purchases

None

Leadkit Inbox

No in-app purchases

Questions

Is Heating Pipe Size free?
Heating Pipe Size costs $5.99, with no in-app purchases.
Is Leadkit Inbox free?
Leadkit Inbox is free to download, with no in-app purchases.
Do Heating Pipe Size or Leadkit Inbox have ads?
Neither Heating Pipe Size nor Leadkit Inbox shows ads.
Which is updated more often, Heating Pipe Size or Leadkit Inbox?
Heating Pipe Size ships an update every 15 months, and Leadkit Inbox every 6 days. Most recently, Heating Pipe Size was updated on September 9, 2026 and Leadkit Inbox on September 22, 2026.

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