# DDM seller vs DataCalc by DPBOX

The clearest difference is in-app purchases: DDM seller at none against DataCalc by DPBOX's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DataCalc by DPBOX sells 1 in-app purchase, starting at $2.99 per year. DDM seller asks for nothing beyond the download.

DDM seller ships an update monthly, DataCalc by DPBOX every 2 months. The most recent releases landed on October 26, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | DDM seller | DataCalc by DPBOX |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 16 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [苏州万俚汇贸易有限公司](https://appshunter.io/developer/1770234653) | [Gavin Foo](https://appshunter.io/developer/556377228) |

## What reviewers say

### DDM seller

[App page](https://appshunter.io/ios/app/ddm-seller/id1313184675)

**Features:** macOS Compatibility

**In-app purchases:** none


### DataCalc by DPBOX

[App page](https://appshunter.io/ios/app/datacalc-by-dpbox-video-data/id6503596289)

This tool helps filmmakers calculate video data capacity, transfer times, and recording durations. It offers offline use, iCloud synchronization, and language/unit switching.

**Highlights:** Offline data calculation, Transfer time estimation, Recording duration calculation, Summary of records, iCloud synchronization, Language and unit switching

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual | $2.99 | per year |


## Frequently asked questions

### Is DDM seller free?

DDM seller is free to download, with no in-app purchases.

### Is DataCalc by DPBOX free?

DataCalc by DPBOX is free to download, with in-app purchases available.

### Do DDM seller or DataCalc by DPBOX have ads?

Neither DDM seller nor DataCalc by DPBOX shows ads.

### Which is updated more often, DDM seller or DataCalc by DPBOX?

DDM seller ships an update monthly, and DataCalc by DPBOX every 2 months. Most recently, DDM seller was updated on October 26, 2026 and DataCalc by DPBOX on November 4, 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.*