# Saindy365 vs DuoNinja

The clearest difference is ads: DuoNinja at none against Saindy365's shown. DuoNinja also leads on update cadence (every 3 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Saindy365 sells 2 in-app purchases, starting at $4.99 per month and DuoNinja sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Saindy365 ships an update monthly, DuoNinja every 3 days. The most recent releases landed on October 28, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Saindy365 | DuoNinja |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/duoninja/id6785968577/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | — | Freemium |
| Size | 57 MB | 13 MB |
| Requires iOS | **14.0.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Rene Gayer](https://appshunter.io/developer/1800023049) | [Mink OÜ](https://appshunter.io/developer/1689550774) |

## What reviewers say

### Saindy365

[App page](https://appshunter.io/ios/app/saindy365-learn-dynamics-365/id6742796539)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Saindy365 Plus - Monthly | $4.99 | per month |
| Saindy365 Plus - Yearly | $29.99 | per year |


### DuoNinja

[App page](https://appshunter.io/ios/app/duoninja/id6785968577)

Master new languages through comprehensible input and build vocabulary with interactive lessons. Enhance reading and listening fluency with authentic content like news and books. Utilize AI-powered tools and dictionaries to quickly look up words and fill knowledge gaps.

**Highlights:** Comprehensible input for language mastery, Vocabulary building lessons, Reading and listening fluency practice, News, texts, and book content, Flashcards for knowledge gaps, AI-powered word lookup, Dictionary integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $7.99 | per month |
| Premium Yearly | $47.90 | per year |


## Frequently asked questions

### Is Saindy365 free?

Saindy365 is free to download, with in-app purchases available.

### Is DuoNinja free?

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

### Do Saindy365 or DuoNinja have ads?

Saindy365 shows ads; DuoNinja does not.

### Which is updated more often, Saindy365 or DuoNinja?

Saindy365 ships an update monthly, and DuoNinja every 3 days. Most recently, Saindy365 was updated on October 28, 2026 and DuoNinja on October 7, 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.*