# JD Memory vs Formula sorting calculator

The clearest difference is ads: JD Memory at none against Formula sorting calculator's shown. JD Memory also leads on iOS requirement (9.0 vs 15.8.3). Formula sorting calculator's advantage is update cadence (every 2 weeks vs every 3 months). On price, 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.

JD Memory ships an update every 3 months, Formula sorting calculator every 2 weeks. The most recent releases landed on October 9, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | JD Memory | Formula sorting calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.7 (32 ratings)](https://appshunter.io/ios/app/jd-memory/id1527531235/reviews)** | — |
| Number of ratings | **32** | — |
| Positive reviews | 17.9% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 107 MB | 37 MB |
| Requires iOS | **9.0** | 15.8.3 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [晓明 徐](https://appshunter.io/developer/1460669893) | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) |

## What reviewers say

### JD Memory

[App page](https://appshunter.io/ios/app/jd-memory/id1527531235)

Manage files and media stored on your Apple USB Drive directly from your device. Browse photos, videos, and music with thumbnail previews, organize documents, and share content easily. Enjoy slideshows for photos and advanced playback options for music.

**Highlights:** Media thumbnail display, List/thumbnail view, File sharing, File operations (copy, cut, delete, create, rename), Local/iStorage data transmission, Photo slideshow, Music playback with artwork and repeat modes

**Features:** macOS Compatibility

**In-app purchases:** none


### Formula sorting calculator

[App page](https://appshunter.io/ios/app/formula-sorting-calculator/id6502130330)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JD Memory free?

JD Memory is free to download, with no in-app purchases.

### Is Formula sorting calculator free?

Formula sorting calculator is free to download, with no in-app purchases.

### Do JD Memory or Formula sorting calculator have ads?

Formula sorting calculator shows ads; JD Memory does not.

### Which is updated more often, JD Memory or Formula sorting calculator?

JD Memory ships an update every 3 months, and Formula sorting calculator every 2 weeks. Most recently, JD Memory was updated on October 9, 2026 and Formula sorting calculator on October 3, 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.*