# Two Phase Separator Lite vs Linear System Solver

The clearest difference is price: Two Phase Separator Lite at Free against Linear System Solver's $0.99. Two Phase Separator Lite also leads on iOS requirement (11.0 vs 15.0). Linear System Solver's advantage is update cadence (every 3 days vs every 35 months). On ads, in-app purchases and device support there is nothing between them.

Two Phase Separator Lite is free to download; Linear System Solver costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Two Phase Separator Lite ships an update every 35 months, Linear System Solver every 3 days. The most recent releases landed on September 23, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | Two Phase Separator Lite | Linear System Solver |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 3 days** |
| Size | 27 MB | 1 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ali Pourahmadi Laleh](https://appshunter.io/developer/1218620381) | [Luigi Fonti](https://appshunter.io/developer/360904185) |

## What reviewers say

### Two Phase Separator Lite

[App page](https://appshunter.io/ios/app/two-phase-separator-lite/id1347623045)

**Features:** macOS Compatibility

**In-app purchases:** none


### Linear System Solver

[App page](https://appshunter.io/ios/app/linear-system-solver/id6469396751)

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

**In-app purchases:** none


## Frequently asked questions

### Is Two Phase Separator Lite free?

Two Phase Separator Lite is free to download, with no in-app purchases.

### Is Linear System Solver free?

Linear System Solver costs $0.99, with no in-app purchases.

### Do Two Phase Separator Lite or Linear System Solver have ads?

Neither Two Phase Separator Lite nor Linear System Solver shows ads.

### Which is updated more often, Two Phase Separator Lite or Linear System Solver?

Two Phase Separator Lite ships an update every 35 months, and Linear System Solver every 3 days. Most recently, Two Phase Separator Lite was updated on September 23, 2026 and Linear System Solver on September 26, 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.*