# データ構造ビューワ vs DeVS

The clearest difference is in-app purchases: データ構造ビューワ at none against DeVS's 4. データ構造ビューワ also leads on ads (none vs shown) and iOS requirement (11.0 vs 15.1). DeVS's advantage is update cadence (every 8 days vs every 41 months). On price and device support there is nothing between them.

Both are free to download. DeVS sells 4 in-app purchases, starting at $4.99 per month. データ構造ビューワ asks for nothing beyond the download.

データ構造ビューワ ships an update every 41 months, DeVS every 8 days. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | データ構造ビューワ | DeVS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Every 8 days** |
| Size | 40 MB | 35 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Asial Corporation](https://appshunter.io/developer/291083834) | [Daisuke Oka](https://appshunter.io/developer/1352359635) |

## What reviewers say

### データ構造ビューワ

[App page](https://appshunter.io/ios/app/id1515255995)

**Features:** macOS Compatibility

**In-app purchases:** none


### DeVS

[App page](https://appshunter.io/ios/app/devs-ai-discussion/id6759862008)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DeVS Basic Plan | $4.99 | per month |
| Devate Ticket | $1.99 | one-time |
| Devate Ticket x5 | $7.99 | one-time |
| Devate Ticket x10 | $12.99 | one-time |


## Frequently asked questions

### Is データ構造ビューワ free?

データ構造ビューワ is free to download, with no in-app purchases.

### Is DeVS free?

DeVS is free to download, with in-app purchases available.

### Do データ構造ビューワ or DeVS have ads?

DeVS shows ads; データ構造ビューワ does not.

### Which is updated more often, データ構造ビューワ or DeVS?

データ構造ビューワ ships an update every 41 months, and DeVS every 8 days. Most recently, データ構造ビューワ was updated on October 29, 2026 and DeVS on October 25, 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.*