# phase estimation algorithm vs E Numbers Guide

The clearest difference is in-app purchases: phase estimation algorithm at none against E Numbers Guide's 4. phase estimation algorithm also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. E Numbers Guide sells 4 in-app purchases, starting at $1.99 per month. phase estimation algorithm asks for nothing beyond the download.

phase estimation algorithm ships an update monthly, E Numbers Guide fortnightly. The most recent releases landed on September 15, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | phase estimation algorithm | E Numbers Guide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | **Fortnightly** |
| Size | 12 MB | 228 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### phase estimation algorithm

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

**Features:** macOS Compatibility

**In-app purchases:** none


### E Numbers Guide

[App page](https://appshunter.io/ios/app/e-numbers-guide/id6478639811)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| en-au | $1.99 | per month |
| en-au | $1.99 | one-time |
| en-au | $5.99 | one-time |
| en-au | $59.99 | one-time |


## Frequently asked questions

### Is phase estimation algorithm free?

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

### Is E Numbers Guide free?

E Numbers Guide is free to download, with in-app purchases available.

### Do phase estimation algorithm or E Numbers Guide have ads?

E Numbers Guide shows ads; phase estimation algorithm does not.

### Which is updated more often, phase estimation algorithm or E Numbers Guide?

phase estimation algorithm ships an update monthly, and E Numbers Guide fortnightly. Most recently, phase estimation algorithm was updated on September 15, 2026 and E Numbers Guide on September 21, 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.*