Comparison

Hardness Conversion Master vs SolarMark

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

Head to head
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

About

SolarMark

Monitor your solar power generation and battery storage systems locally and privately. Visualize real-time energy flow, get intelligent predictions, and receive protection alerts without relying on cloud services.

Highlights
  • Direct Modbus TCP polling
  • Live power flow dashboard
  • Multi-device infrastructure management
  • Localized weather-based generation predictions
  • On-device analytics ledger
  • Open data export (CSV)
  • Protection alerts (no-generation, performance, thermal)
Features
Read full description

Take complete local control of your green energy infrastructure with SolarMark—the ultimate privacy-focused telemetry engine designed explicitly for solar power generation and battery storage systems. Unlike standard cloud platforms that lock your history behind proprietary servers, SolarMark establishes a direct, secure line to your hardware using local Modbus TCP polling. No third-party accounts, no remote data centers, and zero internet tracking dependencies required. REAL-TIME ECOSYSTEM MONITORING • Direct Modbus TCP Polling: Pull telemetry straight from your inverters and battery systems every 5 seconds. • Live Power Flow Dashboard: Instantly visualize generation metrics, grid imports, grid exports, and real-time utility currency valuation flows. • Multi-Device Infrastructure: Seamlessly configure and manage multiple independent inverters and standalone battery installations. INTELLIGENT PREDICTIONS & ANALYTICS • Localized Weather Gating: Synchronize system coordinates with local Open-Meteo irradiance data to generate automated daily generation predictions. • SQLite Analytics Ledger: Securely store lifetime energy metrics, battery state-of-charge curves, performance tracking, and voltage anomalies directly on your device. • Open Data Freedom: Extract energy histories and localized telemetry logs at any time using filtered, uncompressed CSV schema layers. SELF-CALIBRATING PROTECTION ALERTS • No-Generation Alarms: Receive automated system warnings if your hardware fails to initialize or generate power during standard daylight profiles. • Performance Threshold Vetting: SolarMark dynamically maps 30 days of production data to calibrate and alert you if real-time sunlight conversion loops drop below 40% efficiency. • Battery Thermal Shielding: Three independent detection layers monitor and instantly alert you of uncharacteristic voltage shifts or active thermal volatility spikes. FINANCIAL & ENVIRONMENTAL CLEARANCE • Track absolute localized financial tracking metrics with an integrated multi-currency picker (£ $ € ¥ A$ C$). • Toggle your sustainability output dashboards dynamically between metric tons of CO₂ offset or real-time equivalent trees planted. Keep your home data inside your local network. Secure your infrastructure, maximize your grid efficiency index, and download SolarMark today!

Screenshots

Hardness Conversion Master4 screens
SolarMark4 screens

Verdict

The call

The clearest difference is in-app purchases: SolarMark at none against Hardness Conversion Master's 1. SolarMark also leads on ads (none vs shown) and iOS requirement (15.1 vs 17.6). Hardness Conversion Master's advantage is update cadence (every 3 days vs monthly). 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. SolarMark asks for nothing beyond the download.

UpkeepUpdate frequency

Hardness Conversion Master ships an update every 3 days, SolarMark monthly. The most recent releases landed on October 22, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
Hardness Conversion Master versus SolarMark: the parameters behind the verdict, then further details
ParameterHardness Conversion MasterSolarMark
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
Update frequencyEvery 3 days — betterMonthly
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.1 — better
Further details — not scored
Size259 MB55 MB
Age rating4+4+
DeveloperPOYU WANGSolarMark Software LLC

In-app purchases

1 purchases

Hardness Conversion Master

One-time1
  • Unlock Pro$1.99
None

SolarMark

No in-app purchases

Questions

Is Hardness Conversion Master free?
Hardness Conversion Master is free to download, with in-app purchases available.
Is SolarMark free?
SolarMark is free to download, with no in-app purchases.
Do Hardness Conversion Master or SolarMark have ads?
Hardness Conversion Master shows ads; SolarMark does not.
Which is updated more often, Hardness Conversion Master or SolarMark?
Hardness Conversion Master ships an update every 3 days, and SolarMark monthly. Most recently, Hardness Conversion Master was updated on October 22, 2026 and SolarMark on October 23, 2026.

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