# Chlorophyll Role vs phase estimation algorithm

The clearest difference is price: phase estimation algorithm at Free against Chlorophyll Role's $1.99. phase estimation algorithm also leads on update cadence (monthly vs every 18 months). Chlorophyll Role's advantage is iOS requirement (12.0 vs 16.0). On ads, in-app purchases and device support there is nothing between them.

phase estimation algorithm is free to download; Chlorophyll Role costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Chlorophyll Role ships an update every 18 months, phase estimation algorithm monthly. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Chlorophyll Role | phase estimation algorithm |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Monthly** |
| Size | 278 MB | 12 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) | [Sungjun Kim](https://appshunter.io/developer/1602461985) |

## What reviewers say

### Chlorophyll Role

[App page](https://appshunter.io/ios/app/chlorophyll-role-edutech-era/id1661411132)

**Features:** macOS Compatibility

**In-app purchases:** none


### phase estimation algorithm

[App page](https://appshunter.io/ios/app/phase-estimation-algorithm/id6469448415)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Chlorophyll Role free?

Chlorophyll Role costs $1.99, with no in-app purchases.

### Is phase estimation algorithm free?

phase estimation algorithm is free to download, with no in-app purchases.

### Do Chlorophyll Role or phase estimation algorithm have ads?

Neither Chlorophyll Role nor phase estimation algorithm shows ads.

### Which is updated more often, Chlorophyll Role or phase estimation algorithm?

Chlorophyll Role ships an update every 18 months, and phase estimation algorithm monthly. Most recently, Chlorophyll Role was updated on September 17, 2026 and phase estimation algorithm on September 15, 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.*