计算器 EMMO vs Hardness Conversion Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
计算器 EMMO
A professional scientific calculator with a user-friendly interface and customizable themes. It offers advanced functions beyond the standard system calculator, along with a history log for easy access to past calculations.
- Advanced scientific functions
- Customizable themes
- History log
- Multiple sound effects
- Smart and convenient operation
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EMMO计算器 EMMO出品，必属精品 比系统计算器更全能实用，占用空间，方便智能便捷。 出色的马卡龙配色 各种好看的主题 适合女生 10几种音效 历史记录功能
Hardness Conversion Master
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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
Verdict
The clearest difference is price: Hardness Conversion Master at Free against 计算器 EMMO's $1.99. Hardness Conversion Master also leads on update cadence (every 3 days vs monthly). 计算器 EMMO's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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
Hardness Conversion Master is free to download; 计算器 EMMO costs $1.99 up front. Hardness Conversion Master sells 1 one-off in-app purchase. 计算器 EMMO asks for nothing beyond the download.
计算器 EMMO ships an update monthly, Hardness Conversion Master every 3 days. The most recent releases landed on October 27, 2026 and October 22, 2026 respectively.
| Parameter | 计算器 EMMO | Hardness Conversion Master |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (20 ratings) — better | — |
| Positive reviews | 85.2% of reviews | — |
| Number of ratings | 20 — better | — |
| Update frequency | Monthly | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 10 MB | 259 MB |
| Age rating | 4+ | 4+ |
| Developer | EMMO Corp. | POYU WANG |
In-app purchases
计算器 EMMO
No in-app purchases
Hardness Conversion Master
- Unlock Pro$1.99
Questions
Is 计算器 EMMO free?
Is Hardness Conversion Master free?
Do 计算器 EMMO or Hardness Conversion Master have ads?
Which is updated more often, 计算器 EMMO or Hardness Conversion Master?
Other comparisons
