# Bullet Inc vs Koi

The clearest difference is review sentiment: Koi at 100% against Bullet Inc's 7%. Koi also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 16). Bullet Inc's advantage is ads (none vs shown) and ratings volume (452 vs 1). On price there is nothing between them.

Both are free to download. Bullet Inc sells 16 one-off in-app purchases. Koi asks for nothing beyond the download.

Koi holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Bullet Inc has 452 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 7% of Bullet Inc's written reviews are positive against 100% of Koi's.

Bullet Inc ships an update fortnightly, Koi every 5 days. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Bullet Inc | Koi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (452 ratings)](https://appshunter.io/ios/app/bullet-inc/id6457264741/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/koi-rush/id6762474774/reviews)** |
| Number of ratings | **452** | 1 |
| Positive reviews | 7.1% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 159 MB | 15 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | 9+ |
| Developer | [Rollic Games](https://appshunter.io/developer/1452111779) | [Mohamed Kaid](https://appshunter.io/developer/1861859254) |

## What reviewers say

### Bullet Inc

[App page](https://appshunter.io/ios/app/bullet-inc/id6457264741)

Engage in a satisfying chain reaction experience by strategically stacking bullets. Enjoy the simple yet addictive gameplay that creates mesmerizing visual cascades.

**Highlights:** Stacking bullets, Chain reaction gameplay, Satisfying visual cascades, Addictive gameplay, Simple mechanics

**Features:** macOS Compatibility

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Money 1 Pack | $0.99 | one-time |
| Skip-it 2 Pack | $1.99 | one-time |
| Best Seller Pack | $2.99 | one-time |
| Starter Pack | $3.99 | one-time |
| Skip-it 2 Pack | $3.99 | one-time |
| Money 4 Pack | $3.99 | one-time |
| Money 5 Pack | $4.99 | one-time |
| Money 6 Pack | $5.99 | one-time |
| No Ads | $7.99 | one-time |
| Starter Pack | $8.99 | one-time |
| Skip-it 3 Pack | $9.99 | one-time |
| Permanent Double Gun | $12.99 | one-time |
| Skip-it 4 Pack | $14.99 | one-time |
| No Ads & Double Gun Pack | $17.99 | one-time |
| Limitless Skip-it | $42.99 | one-time |
| No More Ads | $49.99 | one-time |

**What reviewers like**

- 🎮 Core gameplay is fun and engaging
- 💰 Free-to-play model with optional purchases

**What reviewers complain about**

- 📺 Excessive ads throughout gameplay
- 💸 Pay-to-win mechanics make progression impossible without spending
- 🐛 Upgrades don't work as advertised (fire rate, bullet power)
- 🐛 Money multipliers don't pay correct amounts
- 🐛 Video rewards fail to load or grant rewards

**Reported bugs**

- Fire rate upgrades don't increase shooting speed
- Bullet power upgrades don't improve damage
- Money multipliers pay incorrect amounts (50% of promised)
- Video rewards don't load or grant rewards
- Final obstacle HP goes negative instead of breaking

**Requested features**

- Fix money multiplier calculations to pay correct amounts
- Make upgrades actually improve gameplay stats
- Clarify gun evolution mechanic and its benefits
- Rebalance upgrade prices to be more reasonable
- Fix video reward system


### Koi

[App page](https://appshunter.io/ios/app/koi-rush/id6762474774)

Control two fish simultaneously in this challenging reflex game. Dodge falling obstacles with precise timing across multiple game modes. Utilize a temporary invincibility power-up to survive longer and compete on global leaderboards.

**Highlights:** Control two fish simultaneously, Three distinct game modes, Temporary invincibility power-up, Game Center leaderboards, Simple tap controls

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

**In-app purchases:** none


## Frequently asked questions

### Is Bullet Inc free?

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

### Is Koi free?

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

### Which has better reviews, Bullet Inc or Koi?

Koi is rated higher. Bullet Inc averages 4.4 out of 5 from 452 ratings, while Koi averages 5.0 from 1 ratings.

### Do Bullet Inc or Koi have ads?

Koi shows ads; Bullet Inc does not.

### Which is updated more often, Bullet Inc or Koi?

Bullet Inc ships an update fortnightly, and Koi every 5 days. Most recently, Bullet Inc was updated on October 20, 2026 and Koi on October 10, 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.*