# respon vs D

The clearest difference is iOS requirement: D at 13.4 against respon's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

respon ships an update every 3 months, D every 2 months. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | respon | D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 months** |
| Size | 16 MB | 25 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [respon, Inc.](https://appshunter.io/developer/1441360548) | [株式会社プロフィット](https://appshunter.io/developer/1436932952) |

## What reviewers say

### respon

[App page](https://appshunter.io/ios/app/respon/id966831550)

**Features:** Vision Pro support

**In-app purchases:** none


### D

[App page](https://appshunter.io/ios/app/d-sma/id1436932953)

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

**In-app purchases:** none


## Frequently asked questions

### Is respon free?

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

### Is D free?

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

### Do respon or D have ads?

Neither respon nor D shows ads.

### Which is updated more often, respon or D?

respon ships an update every 3 months, and D every 2 months. Most recently, respon was updated on September 22, 2026 and D on September 14, 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.*