Comparison

Tools for hardness testing vs Hardness Unit Converter

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

Head to head
About

Tools for hardness testing

Features
Read full description

With this app you can quickly convert your hardness values according to the commonly used standards of the world of hardness testing. Vickers Curvature Correction Calculator: Save the time and trouble of using look up tables: determine your curvature corrected Vickers value with this quick calculator. Spacing / Thickness Calculator (Vickers / Knoop): ISO and ASTM specify that Vickers hardness test indentations must be a distance of at least three times their diagonal apart and the minimum thickness of the specimen must be over 1.5 times the diagonal length. In order to conform to the standards, use the calculator to determine these dimensions for your test. Rockwell Thickness Calculator: When Rockwell testing on thin materials be sure that you are complying with ISO and ASTM standards of minimum thickness with this calculator before you test. Brinell Value Calculator: When using a handheld microscope to measure Brinell indentations, Brinell numbers are normally calculated using ISO 6506-4 tables. This Brinell number calculator quickly provides the Brinell number without the need to consult the tables. Conversion to ISO 18265 (part A1 and B2): The conversion tool for metallic materials uses the tables of ISO 18265. With this e.g. Vickers values can be revalued to tensile strength.

About

Hardness Unit Converter

Easily convert hardness values between 12 different units, including Vickers, Brinell, Rockwell, and Shore. Input your value and select the desired unit for instant conversion, referencing ASTM E 140 standards and polynomial approximations for accuracy.

Highlights
  • Converts 12 hardness units
  • Vickers, Brinell, Rockwell, Shore support
  • Tensile strength conversion
  • ASTM E 140 reference
  • Polynomial approximation for data
  • Simple input and unit selection
Features
Read full description

The Hardness Unit Converter application converts the hardness into 12 types of units. The units to be converted by this application are Vickers hardness HV, Brinell hardness HBS, HBW, Rockwell hardness HRA, HRB, HRC, HRD, Rockwell superficial hardness HR 15 N, HR 30 N, HR 45 N, Shore hardness HS, and tensile strength MPa. Simply input the hardness value and select the unit of hardness with the unit selection button, it will be converted into 12 types of units. This application refers to the approximate conversion table of ASTM E 140 Table 1 and JIS, and data not in the table is calculated by polynomial approximation. Values ​​in the range not normally used are indicated by ().

Screenshots

Tools for hardness testing1 screens
Hardness Unit Converter3 screens

Verdict

The call

The clearest difference is price: Tools for hardness testing at Free against Hardness Unit Converter's $1.99. Tools for hardness testing also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (8.0 vs 15.6). On ads, in-app purchases 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

Tools for hardness testing is free to download; Hardness Unit Converter costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Tools for hardness testing ships an update every 5 weeks, Hardness Unit Converter every 5 months. The most recent releases landed on October 7, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
Tools for hardness testing versus Hardness Unit Converter: the parameters behind the verdict, then further details
ParameterTools for hardness testingHardness Unit Converter
PriceFree — better$1.99
Rating—4.0 (7 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 5 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.6
Further details — not scored
Size12 MB1 MB
Age rating4+4+
DeveloperGroenewold - IT Solutions GmbHKei Suefuji

In-app purchases

None

Tools for hardness testing

No in-app purchases

None

Hardness Unit Converter

No in-app purchases

Questions

Is Tools for hardness testing free?
Tools for hardness testing is free to download, with no in-app purchases.
Is Hardness Unit Converter free?
Hardness Unit Converter costs $1.99, with no in-app purchases.
Do Tools for hardness testing or Hardness Unit Converter have ads?
Neither Tools for hardness testing nor Hardness Unit Converter shows ads.
Which is updated more often, Tools for hardness testing or Hardness Unit Converter?
Tools for hardness testing ships an update every 5 weeks, and Hardness Unit Converter every 5 months. Most recently, Tools for hardness testing was updated on October 7, 2026 and Hardness Unit Converter on September 29, 2026.

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