# BiDot vs Ninja Kunai

The clearest difference is in-app purchases: Ninja Kunai at none against BiDot's 10. Ninja Kunai also leads on ads (none vs shown) and update cadence (every 3 days vs every 9 months). On price and device support there is nothing between them.

Both are free to download. BiDot sells 10 in-app purchases, starting at $2.79 per month. Ninja Kunai asks for nothing beyond the download.

BiDot ships an update every 9 months, Ninja Kunai every 3 days. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | BiDot | Ninja Kunai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/bidot/id900411937/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 84.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 63 MB | 38 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SH Limited](https://appshunter.io/developer/960275282) | [泽源 黄](https://appshunter.io/developer/1631482866) |

## What reviewers say

### BiDot

[App page](https://appshunter.io/ios/app/bidot/id900411937)

A challenging puzzle game where you must separate colored dots by controlling a sliding door. It's easy to learn but difficult to master, offering endless fun with two distinct game modes.

**Highlights:** Separate colored dots, Sliding door mechanic, Two game modes (BiDot, Zen), Easy to learn, hard to master, Constant motion challenges

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium User 1 Month 30% OFF | $2.79 | per month |
| 1 Week premium user | $7.99 | per 7 days |
| 1 Week Premium User free trial | $7.99 | per 7 days |
| 1 Month premium user 0.99 1/mo | $9.99 | per month |
| Premium User 3 Months | $11.99 | per 3 months |
| Premium User 1 Year 30% OFF | $24.49 | per year |
| Premium User 1 Year | $34.99 | per year |
| Premium Pass 1 Month 30% OFF | $3.49 | one-time |
| Premium Pass 1 Month | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |


### Ninja Kunai

[App page](https://appshunter.io/ios/app/ninja-kunai/id1633903024)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BiDot free?

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

### Is Ninja Kunai free?

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

### Do BiDot or Ninja Kunai have ads?

BiDot shows ads; Ninja Kunai does not.

### Which is updated more often, BiDot or Ninja Kunai?

BiDot ships an update every 9 months, and Ninja Kunai every 3 days. Most recently, BiDot was updated on November 1, 2026 and Ninja Kunai on October 27, 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.*