Comparison

SHSI vs Hardness Conversion Master

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

Head to head
About

SHSI

Features
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Main Features: Data Reporting: Ability to submit data. Data Modification: Option to modify submitted data. Historical Data Query: Access to past submissions for review. User Login: Secure login functionality. Account Activation: Activation of user accounts. Password Management: Ability to change passwords. Notification Query: Access to system notifications. Language Switching: Support for switching between Chinese and English.

About

Hardness Conversion Master

Features
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A professional hardness conversion tool designed for mechanical engineering, metal heat treatment, and quality management, providing quick, stable, and traceable engineering reference data. **Key Features** 1. **Industrial-Grade Precision** The conversion logic is based on ASTM E140 / ASTM A370 standards, utilizing high-density reference points and linear interpolation to deliver stable and reproducible conversion results. 2. **Flexible Input and Real-Time Synchronization** Allows direct input in any hardness field (e.g., HRC / HV / HBW), with real-time conversion across other units, enhancing on-site operational efficiency. 3. **Physical Range Protection Mechanism** Built-in effective range checks for each scale, displaying "No Reference Value" when out of range, reducing the risk of misinterpretation. 4. **Customizable Interface** Enables toggling unit displays and drag-and-drop sorting to create a workspace tailored to individual or production line processes. 5. **Image Conversion (Beta)** Supports photo/album import, area selection recognition, result comparison, and manual correction, suitable for quick conversion of reports and on-site records. 6. **Batch Conversion** Allows multiple data entries for rapid conversion, retaining the last used unit preference to minimize repetitive actions. **Supported Units** - Rockwell: HRC, HRA, HRB, HRD, HRF - Superficial Rockwell: HR15N, HR30N, HR45N, HR15T, HR30T, HR45T - Brinell: HB, HBW - Vickers: HV - Tensile Strength: MPa

Screenshots

SHSI4 screens
Hardness Conversion Master4 screens

Verdict

The call

The clearest difference is in-app purchases: SHSI at none against Hardness Conversion Master's 1. SHSI also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.6). Hardness Conversion Master's advantage is update cadence (every 3 days vs every 12 months). On price 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

Both are free to download. Hardness Conversion Master sells 1 one-off in-app purchase. SHSI asks for nothing beyond the download.

UpkeepUpdate frequency

SHSI ships an update every 12 months, Hardness Conversion Master every 3 days. The most recent releases landed on September 30, 2026 and October 5, 2026 respectively.

Scorecard4 real differences Β· 2 level
SHSI versus Hardness Conversion Master: the parameters behind the verdict, then further details
ParameterSHSIHardness Conversion Master
PriceFreeFree
Update frequencyEvery 12 monthsEvery 3 days β€” better
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.0 β€” better17.6
Further details β€” not scored
Size24 MB259 MB
Age rating4+4+
DevelopershssePOYU WANG

In-app purchases

None

SHSI

No in-app purchases

1 purchases

Hardness Conversion Master

One-time1
  • Unlock Pro$1.99

Questions

Is SHSI free?
SHSI is free to download, with no in-app purchases.
Is Hardness Conversion Master free?
Hardness Conversion Master is free to download, with in-app purchases available.
Do SHSI or Hardness Conversion Master have ads?
Hardness Conversion Master shows ads; SHSI does not.
Which is updated more often, SHSI or Hardness Conversion Master?
SHSI ships an update every 12 months, and Hardness Conversion Master every 3 days. Most recently, SHSI was updated on September 30, 2026 and Hardness Conversion Master on October 5, 2026.

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