# Bio Crisis vs Overdrive II

The clearest difference is rating: Bio Crisis at 4.6 against Overdrive II's 4.0. Bio Crisis also leads on ads (none vs shown) and review sentiment (90% vs 57%). Overdrive II's advantage is update cadence (every 6 days vs every 4 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Bio Crisis sells 8 one-off in-app purchases and Overdrive II sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Bio Crisis holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Bio Crisis has 1.2K ratings behind it against 48, so its average is the more settled of the two. Written reviews point the same way: 90% of Bio Crisis's written reviews are positive against 57% of Overdrive II's.

Bio Crisis ships an update every 4 months, Overdrive II every 6 days. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Bio Crisis | Overdrive II |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.2K ratings)](https://appshunter.io/ios/app/bio-crisis/id534460177/reviews)** | [4.0 (48 ratings)](https://appshunter.io/ios/app/overdrive-ii/id1482368169/reviews) |
| Number of ratings | **1.2K** | 48 |
| Positive reviews | **89.9% of reviews** | 56.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 18 MB | 197 MB |
| Requires iOS | **4.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [Dalian Sphinx Entertainment Co., Ltd.](https://appshunter.io/developer/446707785) | [GEM MOBILE SOFTWARE COMPANY](https://appshunter.io/developer/1232513666) |

## What reviewers say

### Bio Crisis

[App page](https://appshunter.io/ios/app/bio-crisis/id534460177)

Experience an exciting, cover-based shooter with a futuristic storyline. This polished pixel shooter offers challenging gameplay, a medal system, and numerous weapons and upgrades. It's a fresh take on old-school gaming with 36 missions to conquer.

**Highlights:** Cover-based shooting mechanics, Futuristic storyline, 36 total missions, Medal system, Tons of weapons and gears, Upgradeable weapons

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10,000 Coins | $0.99 | one-time |
| Instant Revive | $0.99 | one-time |
| 25000 Coins | $1.99 | one-time |
| 70000 Coins | $4.99 | one-time |
| 150000 Coins | $9.99 | one-time |
| 230000 Coins | $14.99 | one-time |
| 500000 Coins | $29.99 | one-time |
| 1200000 Coins | $49.99 | one-time |

**What reviewers like**

- 👍 Good gameplay
- 🚀 Addictive and fun
- 🎨 Retro/old-school style
- 💯 Great for killing time
- 🎮 Nostalgic feel

**What reviewers complain about**

- 💰 In-app purchases for ammo/health
- 🔫 Ammo/health too limited
- 🕹️ Controls can be frustrating
- 🤖 Repetitive enemy types
- 📚 Underdeveloped story

**Reported bugs**

- Occasional crashes
- Stuck movement/aiming issues
- Dialogue/text errors
- Inconsistent performance on older devices

**Requested features**

- Multiplayer co-op mode
- More weapon/character customization
- Increased ammo/health drops
- Longer levels/campaign
- Improved boss battles


### Overdrive II

[App page](https://appshunter.io/ios/app/overdrive-ii/id1482368169)

Engage in a sci-fi hack and slash adventure set in a post-apocalyptic world. Battle a rogue AI's robot army with your ninja warrior skills. Upgrade your character, collect gear, and influence the story in this offline action RPG.

**Highlights:** Hack and slash platformer gameplay, Sci-fi theme and futuristic story, Character upgrades and customization, Offline playability, Modern 3D graphics and realistic physics, Story mode with intriguing narrative

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gem pack 1 | $2.99 | one-time |
| Sheild Drone | $2.99 | one-time |
| Gun Drone | $2.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Gem pack 2 | $4.99 | one-time |
| Gem pack 3 | $9.99 | one-time |
| Gem pack 4 | $19.99 | one-time |
| Dagger S Sword | $19.99 | one-time |
| Jade General Sale 20% | $39.99 | one-time |
| Amber Paladin | $49.99 | one-time |

**What reviewers like**

- 👍 Fun and addictive gameplay
- ✨ Great skills and graphics
- ⚔️ Good hack and slash mechanics
- 🎮 Enjoyable for no Wi-Fi
- 🤩 Best game so far for some

**What reviewers complain about**

- 💸 Overpriced in-app purchases
- 😩 Too many ads
- 🚫 Game feels abandoned
- 📉 Lack of updates
- 🔄 Repetitive gameplay

**Reported bugs**

- Account deleted without user action
- Game crashes or won't load
- Lost all progress after update
- Weekly missions not registering correctly
- Cannot enhance items

**Requested features**

- Replay lunar new year event
- Add more playable characters
- Allow control customization
- Implement cross-save functionality
- Explain how to get the fourth ability


## Frequently asked questions

### Is Bio Crisis free?

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

### Is Overdrive II free?

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

### Which has better reviews, Bio Crisis or Overdrive II?

Bio Crisis is rated higher. Bio Crisis averages 4.6 out of 5 from 1.2K ratings, while Overdrive II averages 4.0 from 48 ratings.

### Do Bio Crisis or Overdrive II have ads?

Overdrive II shows ads; Bio Crisis does not.

### Which is updated more often, Bio Crisis or Overdrive II?

Bio Crisis ships an update every 4 months, and Overdrive II every 6 days. Most recently, Bio Crisis was updated on November 6, 2026 and Overdrive II on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*