Mobile Master vs RDevice Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mobile Master
This free utility app provides detailed information about your device's hardware and software. It measures real CPU frequency, frequency reduction, and offers insights into your screen, battery, network, GPU, RAM, and sensors.
- Measure real CPU frequency
- Monitor frequency reduction
- View CPU, GPU, and RAM details
- Check network speed and IP
- Display battery design capacity
- Access sensor data
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Quickly and accurately measure real cpu frequency and frequency reduction Mobile Master is a free tool to provide information about your device - cpu , operating system , memory, GPU, network and battery. - CPU : Processor , real frequency, frequency ratio,frequency reduction, etc. - General : Screen resolution, size, density, etc. - Battery : Desigin capacity. - Network : IP , download/upload speed , etc. - GPU : GPU Type , extentions. - RAM : Total ram , used ram , etc. - Sensors: Acceleration,rotation,magnetic field,pressure and distance Terms of Use：https://m.591master.com/m/uiforum/getpage.html?key=cputerms Privacy Policy：https://m.591master.com/m/uiforum/getpage.html?key=cpuprivacy
RDevice Viewer
This utility app helps you free up storage space by intelligently identifying and cleaning duplicate photos, screenshots, large files, and videos. It also provides detailed information about your device's hardware, battery, and network usage.
- Intelligent duplicate photo cleaning
- Screenshot and burst photo cleanup
- Large file and video removal
- Photo and video compression
- Device hardware information
- Battery status monitoring
- Network speed and traffic monitoring
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What can RDevice Viewer do? With it, you can easily do these: • Intelligently filter and clean similar pictures • Smart filter and clean up screenshots • Intelligently filter and clean large pictures • Intelligently filter and clean large size videos • Intelligently filter and clean similar videos • Smart filter and clean up burst photos • Smart filter and clean up Live Photos •Intelligently filter and compress pictures •Intelligently filter and compress videos You can also do the following: • Easily grasp various data information of the phone: cpu, memory, storage space and other hardware information • Easy to grasp some battery information: charging status, capacity, etc. • Easily grasp network information: network speed measurement, real-time network speed, network traffic, etc.
Screenshots
Verdict
The clearest difference is review sentiment: Mobile Master at 72% against RDevice Viewer's 0%. Mobile Master also leads on update cadence (every 6 days vs every 2 months) and ratings volume (1.2K vs 15). RDevice Viewer's advantage is in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.6). On price, ads 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
Both are free to download. Mobile Master sells 3 in-app purchases, starting at $0.49 per month. RDevice Viewer asks for nothing beyond the download.
Mobile Master holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: Mobile Master has 1.2K ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 72% of Mobile Master's written reviews are positive against 0% of RDevice Viewer's.
Mobile Master ships an update every 6 days, RDevice Viewer every 2 months. The most recent releases landed on October 8, 2026 and October 9, 2026 respectively.
| Parameter | Mobile Master | RDevice Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (1.2K ratings) — better | 4.3 (15 ratings) |
| Positive reviews | 72.3% of reviews — better | 0.0% of reviews |
| Number of ratings | 1.2K — better | 15 |
| Update frequency | Every 6 days — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 22 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | 东海 刘 | 美凤 吴 |
Customer experience
Mobile Master
RDevice Viewer
In-app purchases
Mobile Master
- Pro Monthly$0.491 Month
- Pro Annual$2.991 Year
- Remove ads$1.99
RDevice Viewer
No in-app purchases
