# Assembly Line 2 vs Critical

The clearest difference is review sentiment: Assembly Line 2 at 80% against Critical's 18%. Assembly Line 2 also leads on in-app purchases (none vs 17) and rating (4.8 vs 4.4). Critical's advantage is iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Critical sells 17 one-off in-app purchases. Assembly Line 2 asks for nothing beyond the download.

Assembly Line 2 holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Assembly Line 2 has 1.5K ratings behind it against 125, so its average is the more settled of the two. Written reviews point the same way: 80% of Assembly Line 2's written reviews are positive against 18% of Critical's.

Assembly Line 2 ships an update weekly, Critical fortnightly. The most recent releases landed on September 23, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Assembly Line 2 | Critical |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.5K ratings)](https://appshunter.io/ios/app/assembly-line-2/id1669722484/reviews)** | [4.4 (125 ratings)](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857/reviews) |
| Number of ratings | **1.5K** | 125 |
| Positive reviews | **79.5% of reviews** | 18.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 138 MB | 99 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Joao Reis](https://appshunter.io/developer/1633456295) | [WaffleStack Studio LLC](https://appshunter.io/developer/1523413949) |

## What reviewers say

### Assembly Line 2

[App page](https://appshunter.io/ios/app/assembly-line-2/id1669722484)

Build and manage a factory to craft and sell resources. Optimize your assembly line with various machines and upgrades to maximize profits, even while offline. Discover new resources and make strategic decisions to grow your industrial empire.

**Highlights:** Build and optimize 21 different machines, Unlock tons of upgrades, Craft around 50 unique resources, Offline progress generation, Informative machine and resource data, Progress backup

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fun gameplay
- 👍 Optional ads
- 🎨 Good visuals
- 🕹️ Engaging factory management

**What reviewers complain about**

- 🐛 Clunky controls
- 🔋 Battery drain issues
- 🧭 Unclear progression
- 🧠 Tedious menu navigation

**Reported bugs**

- Inconsistent offline earnings
- Crafters and splitters stop working
- Crashes on launch

**Requested features**

- Copy/paste assembly lines
- Rotate/flip multiple machines
- Pause production
- Better performance optimization


### Critical

[App page](https://appshunter.io/ios/app/critical-incremental-reactor/id6446354857)

Manage a reactor to prevent it from becoming critical by delivering water. Earn money over time to unlock permanent upgrades and improve your survival capabilities. Invest wisely to extend your runs and uncover secrets.

**Highlights:** Reactor management, Incremental income generation, Permanent upgrades, Research and secrets, Survival gameplay

**Features:** macOS Compatibility

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Gems | $2.99 | one-time |
| 100 Gems | $4.99 | one-time |
| Remove Ads | $7.99 | one-time |
| 225 Gems | $7.99 | one-time |
| Starter Pack | $9.99 | one-time |
| Remove All Ads | $9.99 | one-time |
| 225 Gems | $9.99 | one-time |
| 500 Gems | $9.99 | one-time |
| Pro Pack | $9.99 | one-time |
| Pro Pack | $14.99 | one-time |
| New Player Sale | $14.99 | one-time |
| 500 Gems | $14.99 | one-time |
| 1400 Gems | $19.99 | one-time |
| 800 Gems | $19.99 | one-time |
| 1400 Gems | $29.99 | one-time |
| 3000 Gems | $29.99 | one-time |
| 3000 Gems | $39.99 | one-time |


## Frequently asked questions

### Is Assembly Line 2 free?

Assembly Line 2 is free to download, with no in-app purchases.

### Is Critical free?

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

### Which has better reviews, Assembly Line 2 or Critical?

Assembly Line 2 is rated higher. Assembly Line 2 averages 4.8 out of 5 from 1.5K ratings, while Critical averages 4.4 from 125 ratings.

### Do Assembly Line 2 or Critical have ads?

Both Assembly Line 2 and Critical show ads.

### Which is updated more often, Assembly Line 2 or Critical?

Assembly Line 2 ships an update weekly, and Critical fortnightly. Most recently, Assembly Line 2 was updated on September 23, 2026 and Critical on September 22, 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.*