Comparison

网络预付费 vs Hardness Conversion Master

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

Head to head
About

网络预付费

Features
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网络预付费方便高校、商业综合体完成能源管理工作,协助物业提高工作效率。

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

网络预付费2 screens
Hardness Conversion Master4 screens

Verdict

The call

The clearest difference is in-app purchases: 网络预付费 at none against Hardness Conversion Master's 1. 网络预付费 also leads on ads (none vs shown) and iOS requirement (11.0 vs 17.6). Hardness Conversion Master's advantage is update cadence (every 3 days vs every 14 months). On price 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

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

UpkeepUpdate frequency

网络预付费 ships an update every 14 months, Hardness Conversion Master every 3 days. The most recent releases landed on September 10, 2026 and August 31, 2026 respectively.

Scorecard4 real differences · 2 level
网络预付费 versus Hardness Conversion Master: the parameters behind the verdict, then further details
Parameter网络预付费Hardness Conversion Master
PriceFreeFree
Update frequencyEvery 14 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better17.6
Further details — not scored
Size18 MB259 MB
Age rating4+4+
Developer珠海派诺科技股份有限公司POYU WANG

In-app purchases

None

网络预付费

No in-app purchases

1 purchases

Hardness Conversion Master

One-time1
  • Unlock Pro$1.99

Questions

Is 网络预付费 free?
网络预付费 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 网络预付费 or Hardness Conversion Master have ads?
Hardness Conversion Master shows ads; 网络预付费 does not.
Which is updated more often, 网络预付费 or Hardness Conversion Master?
网络预付费 ships an update every 14 months, and Hardness Conversion Master every 3 days. Most recently, 网络预付费 was updated on September 10, 2026 and Hardness Conversion Master on August 31, 2026.

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