# Kernel King vs PhdEtty

The clearest difference is rating: PhdEtty at 5.0 against Kernel King's 4.5. PhdEtty also leads on review sentiment (100% vs 89%). Kernel King's advantage is ads (none vs shown) and update cadence (every 6 days vs every 2 months). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Kernel King sells 10 one-off in-app purchases and PhdEtty sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

PhdEtty holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Kernel King has 40 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 89% of Kernel King's written reviews are positive against 100% of PhdEtty's.

Kernel King ships an update every 6 days, PhdEtty every 2 months. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kernel King | PhdEtty |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (40 ratings)](https://appshunter.io/ios/app/kernel-king/id1072806976/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/phdetty-idle-vaccine-lab/id6779682236/reviews)** |
| Number of ratings | **40** | 2 |
| Positive reviews | 89.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 46 MB | 10 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Blake Eckert](https://appshunter.io/developer/1031112881) | [Jake Rogers](https://appshunter.io/developer/1604321018) |

## What reviewers say

### Kernel King

[App page](https://appshunter.io/ios/app/kernel-king/id1072806976)

Tap to create an endless stream of popcorn in this addictive idle game. Invest in upgrades to pop faster, earn more, and unlock new poppers. Compete with friends and aim to become the ultimate Kernel King.

**Highlights:** Tap to make popcorn, Investments for faster popping, Upgrade popper and recipe, Offline kernel earnings, Unlockable poppers, Prestige system, Bonuses and multipliers

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Double Kernels Per Second | $0.99 | one-time |
| Double Kernels | $0.99 | one-time |
| Remove Ads | $0.99 | one-time |
| Kernel Blast | $1.99 | one-time |
| Shaker of Salt | $1.99 | one-time |
| Treadmill | $1.99 | one-time |
| King Kernel | $4.99 | one-time |
| Salt Mine | $9.99 | one-time |
| Kernel Bomb | $19.99 | one-time |
| Forever 20x | $49.99 | one-time |

**What reviewers like**

- 😊 Highly addictive and engaging gameplay
- 👍 Simple and easy to play mechanics
- 🎮 Fun way to pass time and avoid boredom
- 💰 Can customize without spending real money
- 🎯 Great for all ages including children

**What reviewers complain about**

- 📺 Excessive ads appearing frequently
- 💸 Expensive upgrades and progression
- 🐛 Game crashes and kicks to home screen
- ⏱️ Slow progression and kernel earning
- 🔄 Data loss after crashes

**Reported bugs**

- Game crashes and forces user to home screen
- Data loss when game crashes
- Game won't start without reviewing or advertising
- Glitches causing loss of progress

**Requested features**

- Timer mode to track kernels earned
- Upgrade levels with multipliers for easier progression
- Better tutorial or onboarding instructions
- More diverse upgrades and features


### PhdEtty

[App page](https://appshunter.io/ios/app/phdetty-idle-vaccine-lab/id6779682236)

Build a biotech empire by tapping to synthesize vaccines, automating production, and managing a shipping fleet. Spin off startups for permanent advantages and earn while you're away. Features honest design with optional boosts.

**Highlights:** Tap to synthesize vaccines, Automate lab production, Manage shipping fleet, Spin off startups, Earn while away, Research tree upgrades, Pet lab cats

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Time Warp: 8 Hours | $1.99 | one-time |
| Royal Magenta | $1.99 | one-time |
| 24K Reserve | $1.99 | one-time |
| Spectral | $2.99 | one-time |
| Tenure Track | $4.99 | one-time |
| Time Warp: 24 Hours | $4.99 | one-time |


## Frequently asked questions

### Is Kernel King free?

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

### Is PhdEtty free?

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

### Which has better reviews, Kernel King or PhdEtty?

PhdEtty is rated higher. Kernel King averages 4.5 out of 5 from 40 ratings, while PhdEtty averages 5.0 from 2 ratings.

### Do Kernel King or PhdEtty have ads?

PhdEtty shows ads; Kernel King does not.

### Which is updated more often, Kernel King or PhdEtty?

Kernel King ships an update every 6 days, and PhdEtty every 2 months. Most recently, Kernel King was updated on November 2, 2026 and PhdEtty on October 31, 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.*