# Rat Killer Robot Invasion vs Bionics

Rat Killer Robot Invasion and Bionics both sit at 4.6 stars, but that hides the real split: 31% of Rat Killer Robot Invasion's written reviews are positive against 23% of Bionics's. Rat Killer Robot Invasion also leads on iOS requirement (12.0 vs 14.0). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Rat Killer Robot Invasion sells 17 in-app purchases, starting at $4.99 per 7 days and Bionics sells 16 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.6 for Rat Killer Robot Invasion against 4.7 for Bionics. Both are backed by a comparable volume of ratings — 2K and 2.5K respectively. Written reviews are what separate them: 31% of Rat Killer Robot Invasion's written reviews are positive against 23% of Bionics's.

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Rat Killer Robot Invasion | Bionics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (2K ratings)](https://appshunter.io/ios/app/rat-killer-robot-invasion/id6464372285/reviews) | **[4.7 (2.5K ratings)](https://appshunter.io/ios/app/bionics/id6502816263/reviews)** |
| Number of ratings | 2K | **2.5K** |
| Positive reviews | **31.1% of reviews** | 22.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | Every 10 days |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 353 MB | 320 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 12+ |
| Developer | [TapNation](https://appshunter.io/developer/1483575279) | [Voodoo](https://appshunter.io/developer/714804730) |

## What reviewers say

### Rat Killer Robot Invasion

[App page](https://appshunter.io/ios/app/rat-killer-robot-invasion/id6464372285)

Embark on an epic quest to exterminate waves of invading rats with futuristic weapons. Collect in-game currency to unlock new zones, upgrade your robot companion, and customize its appearance. Explore diverse worlds and face challenging puzzles and boss battles.

**Highlights:** Rat extermination action, Robot customization, Weapon collection and upgrades, Diverse world exploration, Puzzles and boss battles, Collect money and gems

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Membership - Weekly | $4.99 | per 7 days |
| Elite Membership - Weekly | $8.99 | per 7 days |
| Elite Membership - Monthly | $24.99 | per month |
| Skip It - Small Pack | $0.99 | one-time |
| One Time Offer | $1.99 | one-time |
| Handful Of Crystals | $1.99 | one-time |
| Bunch Of Crystals | $4.99 | one-time |
| Skip It - Medium Pack | $8.99 | one-time |
| Pile Of Crystals | $8.99 | one-time |
| Rats Pass | $9.99 | one-time |
| Small Bundle | $11.99 | one-time |
| Master Mode | $15.99 | one-time |
| Starter Pack | $15.99 | one-time |
| Medium Bundle | $24.99 | one-time |
| Limited Offer Pack | $29.99 | one-time |
| Premium Offer | $39.99 | one-time |
| Crate Of Crystals | $89.99 | one-time |

**What reviewers like**

- 👍 Fun gameplay
- 🦂 Scorpion mech character

**What reviewers complain about**

- 🐛 Glitchy and buggy
- 🕰️ Excessive ads
- ⚠️ Imbalanced game mechanics
- 💰 Progression blocked by premium currency

**Reported bugs**

- Character flipping upside down or flying across the board
- NPCs getting stuck in portals or on walls
- Incorrect item/reward drops from chests
- Launching player off the screen
- Robot unable to keep legs on the ground and rolling around

**Requested features**

- Optimize performance and fix bugs
- Improve game balance and progression
- Add more content and features
- Provide better customer support


### Bionics

[App page](https://appshunter.io/ios/app/bionics/id6502816263)

Engage in an epic survival experience during a zombie apocalypse. Utilize bionic gear, powerful skills, and a vast arsenal of weapons to battle relentless undead hordes and fight for humanity's survival.

**Highlights:** Zombie apocalypse survival, Bionic gear and skills, Arsenal of guns, Battle undead hordes, Stunning visual effects

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

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Some Gems | $0.99 | one-time |
| Season Pass Plus Upgrade | $2.99 | one-time |
| Remove Forced Ads | $3.99 | one-time |
| Pile of Gems | $4.99 | one-time |
| Special Offer | $4.99 | one-time |
| Special Offer | $5.99 | one-time |
| Season Pass | $6.99 | one-time |
| Special Offer | $6.99 | one-time |
| Starter Pack | $7.99 | one-time |
| Blessings | $9.99 | one-time |
| Heap of Gems | $9.99 | one-time |
| Season Pass Plus | $9.99 | one-time |
| Special Offer | $9.99 | one-time |
| Special Offer | $12.99 | one-time |
| Stack of Gems | $19.99 | one-time |
| Special Offer | $19.99 | one-time |

**What reviewers like**

- 🚀 Efficient gameplay
- 👍 Fun and engaging
- 🕹️ Good time killer

**What reviewers complain about**

- 🐛 Bugs and glitches
- 💰 Excessive ads and in-app purchases
- 🕹️ Unbalanced and frustrating gameplay

**Reported bugs**

- Crashes and freezes
- Loading issues and unresponsive app
- Purchased content not working as expected

**Requested features**

- Ability to replay completed levels
- More diverse and meaningful upgrades
- Improved controls and movement


## Frequently asked questions

### Is Rat Killer Robot Invasion free?

Rat Killer Robot Invasion is free to download, with in-app purchases available.

### Is Bionics free?

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

### Which has better reviews, Rat Killer Robot Invasion or Bionics?

Bionics is rated higher. Rat Killer Robot Invasion averages 4.6 out of 5 from 2K ratings, while Bionics averages 4.7 from 2.5K ratings.

### Do Rat Killer Robot Invasion or Bionics have ads?

Both Rat Killer Robot Invasion and Bionics show ads.

### Which is updated more often, Rat Killer Robot Invasion or Bionics?

Rat Killer Robot Invasion ships an update every 10 days, and Bionics every 10 days. Most recently, Rat Killer Robot Invasion was updated on September 24, 2026 and Bionics on September 23, 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.*