HEMS vs Volume Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HEMS
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Home Energy Management System that provide measurement of Energy consumption, Environment and air pollution for example: Temperature, Humidity, PM2.5,etc. All data show on both Application and Website. This system also include the Air condition controller which user can control on remote area by using Application or Website.
Volume Converter
This versatile tool converts volume and capacity units across many systems, including metric, US, UK, and traditional Japanese measurements. Its simple, intuitive interface provides instant results, making it useful for professionals and students in fields like engineering, cooking, and architecture. The app functions offline, ensuring accessibility anywhere.
- Converts volume and capacity units
- Supports metric, US, UK, and Japanese units
- Instant conversion results
- Simple and intuitive interface
- Offline functionality
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Easily convert volume and capacity units with this app. It supports common units like m³, L, and mL, as well as US units (gal, qt, pt, cup, fl oz, tbsp, tsp), UK units (gal(UK), qt(UK), pt(UK)), and even traditional Japanese units such as koku, to, sho, and go.\n\nThis app is useful for fields like architecture, engineering, chemistry, physics, cooking, and education. Its simple UI allows intuitive operation—just enter a value and get instant results.\n\nIt works offline, so you can use it anywhere without internet access. Ideal for professionals and casual users alike!\n\n【Main Features】\n- Supports various units (L, mL, gallons, cups, Japanese sho, etc.)\n- Instantly converts values with a simple design\n- Usable offline\n- Intuitive interface\n\nTry this volume and capacity unit converter today!
Screenshots
Verdict
The clearest difference is in-app purchases: HEMS at none against Volume Converter's 2. HEMS also leads on iOS requirement (11.0 vs 15.0). Volume Converter's advantage is device support. On price 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
Both are free to download. Volume Converter sells 2 in-app purchases, starting at $4.99 per month. HEMS asks for nothing beyond the download.
| Parameter | HEMS | Volume Converter |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | — | Every 10 months |
| Ads | — | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | — | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 53 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | NDR Solution (Thailand) Co., Ltd. | kota tada |
In-app purchases
HEMS
No in-app purchases
Volume Converter
- Ad-free for 1 month7 Days trial$4.991 Month
- Ad-free for 1 year14 Days trial$49.991 Year









