# Sigma Counter vs DoorCodes Vault

The clearest difference is in-app purchases: Sigma Counter at none against DoorCodes Vault's 1. Sigma Counter also leads on iOS requirement (9.0 vs 17.0). DoorCodes Vault's advantage is update cadence (every 8 days vs every 52 months). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. DoorCodes Vault sells 1 one-off in-app purchase. Sigma Counter asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for Sigma Counter against 5.0 for DoorCodes Vault. Both are backed by a comparable volume of ratings — 7 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Sigma Counter ships an update every 52 months, DoorCodes Vault every 8 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Sigma Counter | DoorCodes Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (7 ratings)](https://appshunter.io/ios/app/sigma-counter/id1180349975/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/doorcodes-vault/id6761863570/reviews)** |
| Number of ratings | **7** | 3 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 52 months | **Every 8 days** |
| Monetization | Free | Free |
| Size | 11 MB | 4 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Karen Grigorian](https://appshunter.io/developer/948320401) | [Tom Lewis](https://appshunter.io/developer/413388113) |

## What reviewers say

### Sigma Counter

[App page](https://appshunter.io/ios/app/sigma-counter/id1180349975)

Easily count objects in your photos by tapping them. Save and share your counted images via email or social networks. Utilize specialized tools for marking sequential or grid-like object arrangements.

**Highlights:** Tap to count objects, Use photos from library or new photos, Save and share counted images, Line tool for sequential objects, Multiplication tool for grid layouts

**Features:** macOS Compatibility

**In-app purchases:** none


### DoorCodes Vault

[App page](https://appshunter.io/ios/app/doorcodes-vault/id6761863570)

This app securely stores your access codes for places like apartment buzzers, gates, and offices. It provides privacy-safe reminders when you approach a saved location, ensuring you have the right code ready.

**Highlights:** Save access codes for various locations, Privacy-safe location-based reminders, Secure Reveal for hidden codes, Nearby and Recents views, Optional iCloud sync

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DoorCodes Plus | $9.99 | one-time |


## Frequently asked questions

### Is Sigma Counter free?

Sigma Counter is free to download, with no in-app purchases.

### Is DoorCodes Vault free?

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

### Which has better reviews, Sigma Counter or DoorCodes Vault?

DoorCodes Vault is rated higher. Sigma Counter averages 4.9 out of 5 from 7 ratings, while DoorCodes Vault averages 5.0 from 3 ratings.

### Do Sigma Counter or DoorCodes Vault have ads?

Neither Sigma Counter nor DoorCodes Vault shows ads.

### Which is updated more often, Sigma Counter or DoorCodes Vault?

Sigma Counter ships an update every 52 months, and DoorCodes Vault every 8 days. Most recently, Sigma Counter was updated on October 24, 2026 and DoorCodes Vault on October 24, 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.*