# TDMS vs CSV Viewer and Editor

The clearest difference is in-app purchases: TDMS at none against CSV Viewer and Editor's 2. CSV Viewer and Editor's advantage is update cadence (every 6 months vs every 26 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CSV Viewer and Editor sells 2 in-app purchases, starting at $1.99 per month. TDMS asks for nothing beyond the download.

TDMS ships an update every 26 months, CSV Viewer and Editor every 6 months. The most recent releases landed on October 1, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | TDMS | CSV Viewer and Editor |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 6 months** |
| Size | 4 MB | 41 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TOHNICHI MFG.CO., LTD.](https://appshunter.io/developer/1609166229) | [Sahana A S](https://appshunter.io/developer/1800491118) |

## What reviewers say

### TDMS

[App page](https://appshunter.io/ios/app/tdms/id6479276073)

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

**In-app purchases:** none


### CSV Viewer and Editor

[App page](https://appshunter.io/ios/app/csv-viewer-and-editor/id6761209158)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| csvvedit Pro Monthly | $1.99 | per month |
| csvvedit Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is TDMS free?

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

### Is CSV Viewer and Editor free?

CSV Viewer and Editor is free to download, with in-app purchases available.

### Do TDMS or CSV Viewer and Editor have ads?

Neither TDMS nor CSV Viewer and Editor shows ads.

### Which is updated more often, TDMS or CSV Viewer and Editor?

TDMS ships an update every 26 months, and CSV Viewer and Editor every 6 months. Most recently, TDMS was updated on October 1, 2026 and CSV Viewer and Editor on October 13, 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.*