# Dラボ vs ARpaca

The clearest difference is in-app purchases: ARpaca at none against Dラボ's 5. Dラボ's advantage is device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Dラボ sells 5 in-app purchases, starting at $1.99 per month. ARpaca asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Dラボ | ARpaca |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (12 ratings)](https://appshunter.io/ios/app/d-daigo/id1465859054/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 13.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 79 MB | 89 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [keigo matsumaru](https://appshunter.io/developer/1405989123) | [Masaki Cho](https://appshunter.io/developer/1728607801) |

## What reviewers say

### Dラボ

[App page](https://appshunter.io/ios/app/d-daigo/id1465859054)

Access thousands of psychology videos explained by a popular mentalist. Enjoy features like offline playback, adjustable playback speed, and personalized recommendations. Unlock premium features with subscription plans.

**Highlights:** Thousands of psychology videos, Offline video playback, Adjustable playback speed, Background playback, Chapter saving, Recommended courses, Suggestive search

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間払い | $1.99 | per month |
| 月間払い | $2.49 | per month |
| 半年払い | $14.49 | per 6 months |
| 年間払い | $27.49 | per year |
| 月間払い | $34.99 | per month |


### ARpaca

[App page](https://appshunter.io/ios/app/arpaca/id6477148951)

**In-app purchases:** none


## Frequently asked questions

### Is Dラボ free?

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

### Is ARpaca free?

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

### Do Dラボ or ARpaca have ads?

Neither Dラボ nor ARpaca shows ads.

### Which is updated more often, Dラボ or ARpaca?

Dラボ ships an update fortnightly, and ARpaca fortnightly. Most recently, Dラボ was updated on September 25, 2026 and ARpaca on September 9, 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.*