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 3 weeks). 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 3 weeks, Hardness Conversion Master every 3 days. The most recent releases landed on October 24, 2026 and October 22, 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 3 weeksEvery 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 3 weeks, and Hardness Conversion Master every 3 days. Most recently, SHSI was updated on October 24, 2026 and Hardness Conversion Master on October 22, 2026.

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