RSD Notes vs MRLDS 400
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RSD Notes
Organize your job-related information with this app. Create notes, attach media, and easily find store locations. Access a built-in refrigerant pressure-temperature chart for quick reference.
- Create and store notes
- Attach photos, videos, and voice recordings
- Find RSD store locations with GPS
- Built-in refrigerant PT chart
- Email notes to RSD employee
- Corporate contact information
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RSD Notes is an application designed to keep your notes organized and stored with you at all times. Users can quickly create a note record for anything. Whether it’s specific job information, a materials list, collecting a model and serial number for a part needed, RSD notes will keep you organized. Creating a note with RSD Notes also gives users the ability to attach multiple photos, videos and voice recordings. Users can even email notes to an RSD employee with photos and voice recordings attached! Need to find a RSD location? With RSD Notes, finding a location has never been easier. Pinch to Zoom and GPS location will get you to an RSD in no time. Users can quickly find directions to a store, find store phone numbers or an email address. Having a hard time finding a PT chart for the refrigerant you’re working with? RSD Notes has a built in PT chart for users to access quickly with multiple refrigerants to choose from. Features RSD Store locator – Quickly locate a RSD branch Note application – Create and store notes to keep with you at all times PT Chart – Determine the proper pressures and temperatures of multiple refrigerants when on the job. Corporate Contact – Contact our corporate office NOTE: Continued use of GPS running in the background can dramatically decrease battery life.
MRLDS 400
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The Copeland MRLDS 400 App allows users to configure, maintain and interface with compatible MRLDS-400 Gas detectors. Once a Bluetooth connection has been established, the app replaces the need for specialty training/tools and makes compliance with safety standards (ASHRAE 15, EN 378) easy and effective. Features include: -Configuration (Rename device, define alarm thresholds, adjust Modbus settings, configure relay behavior and manage analog output settings.) -Maintenance (test LED/buzzer function, relays, and analog output level.) -Calibration (View sensor type, serial number and “Calibration Due” timer and initiate zero / span calibrations with customizable field calibration certificate.) Intuitive Interface (view current gas measurement and acknowledge alarm/fault status.)
Screenshots
Verdict
The clearest difference is update cadence: RSD Notes at monthly against MRLDS 400's every 5 months. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
RSD Notes ships an update monthly, MRLDS 400 every 5 months. The most recent releases landed on October 2, 2026 and September 28, 2026 respectively.
| Parameter | RSD Notes | MRLDS 400 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Monthly — better | Every 5 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.4 — better | 14.0 |
| Further details — not scored | ||
| Size | 54 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Refrigeration Supplies Distributor | Copeland LP |
In-app purchases
RSD Notes
No in-app purchases
MRLDS 400
No in-app purchases









