# Comma vs Doorstep Technology

The clearest difference is in-app purchases: Doorstep Technology at none against Comma's 3. Doorstep Technology also leads on ads (none vs shown) and update cadence (fortnightly vs every 4 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Comma sells 3 in-app purchases, starting at $4.99 per 7 days. Doorstep Technology asks for nothing beyond the download.

Comma ships an update every 4 months, Doorstep Technology fortnightly. Both last shipped on September 9, 2026.

## The numbers

| Metric | Comma | Doorstep Technology |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Fortnightly** |
| Size | 61 MB | 69 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MATEUSZ JAROSŁAW WRZESZCZ](https://appshunter.io/developer/1857207465) | [Kakada Ly](https://appshunter.io/developer/1499552919) |

## What reviewers say

### Comma

[App page](https://appshunter.io/ios/app/comma-grammar-check-corrector/id6743360918)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Monthly Subscription | $9.99 | per month |
| Annual Subscription | $29.99 | per year |


### Doorstep Technology

[App page](https://appshunter.io/ios/app/doorstep-technology/id6760248714)

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

**In-app purchases:** none


## Frequently asked questions

### Is Comma free?

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

### Is Doorstep Technology free?

Doorstep Technology is free to download, with no in-app purchases.

### Do Comma or Doorstep Technology have ads?

Comma shows ads; Doorstep Technology does not.

### Which is updated more often, Comma or Doorstep Technology?

Comma ships an update every 4 months, and Doorstep Technology fortnightly. Most recently, Comma was updated on September 9, 2026 and Doorstep Technology on September 9, 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.*