# RSD Notes vs MRLDS 400

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.

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.

## The numbers

| Metric | RSD Notes | MRLDS 400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/rsd-notes/id639483216/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free | — |
| Size | 54 MB | 8 MB |
| Requires iOS | **13.4** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Refrigeration Supplies Distributor](https://appshunter.io/developer/639483219) | [Copeland LP](https://appshunter.io/developer/464252882) |

## What reviewers say

### RSD Notes

[App page](https://appshunter.io/ios/app/rsd-notes/id639483216)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### MRLDS 400

[App page](https://appshunter.io/ios/app/mrlds-400/id1502566407)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RSD Notes free?

RSD Notes is free to download, with no in-app purchases.

### Is MRLDS 400 free?

MRLDS 400 is free to download, with no in-app purchases.

### Do RSD Notes or MRLDS 400 have ads?

Neither RSD Notes nor MRLDS 400 shows ads.

### Which is updated more often, RSD Notes or MRLDS 400?

RSD Notes ships an update monthly, and MRLDS 400 every 5 months. Most recently, RSD Notes was updated on October 2, 2026 and MRLDS 400 on September 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*