Comparison

Sigma Counter vs DoorCodes Vault

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Sigma Counter

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
Read full description

Take a new photo or pick a photo from your photo library and then count objects on it by tapping them. Save screenshots and/or share them via email or social networks. Use the Line tool when you need to mark a sequence of objects with equal distances between them (note: this doesn't work well with object viewed in perspective). Use the Multiplication tool to count objects positioned in 'rows' and 'columns'.

About

DoorCodes Vault

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
Read full description

DoorCodes keeps your saved access details ready when you actually need them. Save apartment buzzers, gate codes, garage entries, office suites, and other place-based access details in one calm, private app. When you get close to a saved place, DoorCodes can surface a privacy-safe reminder so you are not digging through notes, texts, or old emails at the door. DoorCodes is designed for everyday trust: - save places with one or more access codes - see Nearby and Recents views built around real arrival moments - keep lock-screen alerts privacy-safe - protect hidden codes with Secure Reveal - optionally sync through your private iCloud account Launch scope for v1 focuses on the iPhone and iPad core app experience. Apple Watch, widgets, and Live Activity remain out of the public launch promise, and Apple Watch is intentionally sidelined for this release unless launch scope changes in a later update.

Screenshots

Sigma Counter4 screens
DoorCodes Vault4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 7 level
Sigma Counter versus DoorCodes Vault: the parameters behind the verdict, then further details
ParameterSigma CounterDoorCodes Vault
PriceFreeFree
Rating4.9 (7 ratings)5.0 (3 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings7 — better3
Update frequencyEvery 52 monthsEvery 8 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS9.0 — better17.0
Further details — not scored
Size11 MB4 MB
Age rating4+4+
DeveloperKaren GrigorianTom Lewis

Customer experience

Sigma Counter

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

DoorCodes Vault

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Sigma Counter

No in-app purchases

1 purchases

DoorCodes Vault

One-time1
  • DoorCodes Plus$9.99

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.

Other comparisons