# Positional Encoding vs Q

The clearest difference is in-app purchases: Positional Encoding at none against Q's 3. Positional Encoding also leads on iOS requirement (18.5 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Q sells 3 in-app purchases, starting at $4.99 per month. Positional Encoding asks for nothing beyond the download.

Positional Encoding ships an update monthly, Q every 5 weeks. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Positional Encoding | Q |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Size | 2 MB | 8 MB |
| Requires iOS | **18.5** | 26.0 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [carl nohre](https://appshunter.io/developer/452344755) | [EUNMIN PARK](https://appshunter.io/developer/1549813078) |

## What reviewers say

### Positional Encoding

[App page](https://appshunter.io/ios/app/positional-encoding/id6749869150)

**In-app purchases:** none


### Q

[App page](https://appshunter.io/ios/app/q-alpha/id6760243993)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Q-Alpha Pro (Monthly) | $4.99 | per month |
| Q-Alpha Pro (Yearly) | $29.99 | per year |
| Q-Alpha Learner Lifetime | $49.99 | one-time |


## Frequently asked questions

### Is Positional Encoding free?

Positional Encoding is free to download, with no in-app purchases.

### Is Q free?

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

### Do Positional Encoding or Q have ads?

Neither Positional Encoding nor Q shows ads.

### Which is updated more often, Positional Encoding or Q?

Positional Encoding ships an update monthly, and Q every 5 weeks. Most recently, Positional Encoding was updated on September 26, 2026 and Q on September 18, 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.*