Comparison

HCC2D Decoder vs Logn

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

Head to head
About

HCC2D Decoder

Scan and decode advanced HCC2D color codes and standard QR codes using your device's camera. This app offers real-time scanning with robust error correction and is based on cutting-edge barcode research.

Highlights
  • Decode HCC2D color codes
  • Full QR code support
  • Real-time camera scanning
  • Robust detection and error correction
  • No ads or registration
Features
Read full description

This app allows you to scan and decode HCC2D and QR code symbols using your mobile camera. It is based on advanced research in high-capacity barcode technologies and provides reliable decoding. Key features: * Decode HCC2D color codes. * Full support for standard QR codes. * Real-time scanning using the camera. * Robust detection and error correction. * No ads and no registration required. HCC2D is a color two-dimensional code format that increases data capacity compared to traditional QR codes while preserving their structure. By using multiple colors, each module can encode more information, enabling higher data density in a compact symbol. The app captures images, detects barcode regions, corrects perspective distortions, and analyzes color or intensity patterns to reconstruct the encoded data. To transfer files from a desktop computer to your smartphone via a stream of HCC2D codes, use HCC2D Decoder together with the HCC2D Streamer desktop companion app. Notes: HCC2D codes can be created using the official online generator at hcc2d.com, the HCC2D Encoder application, the open-source CLI encoder, or the Debian/Ubuntu packages provided through the official HCC2D APT repository. * Low-quality color printing may reduce decoding performance * Best results are achieved with screen-displayed or high-quality printed codes and a high-resolution autofocus camera. * One-dimensional barcodes are intentionally not supported. References: * Querini, M. (2026). HCC2D Code Specification — Version 0.9.0. Zenodo. https://doi.org/10.5281/zenodo.22206528. Licensed under the Creative Commons Attribution-NoDerivatives 4.0 International License (CC BY-ND 4.0). * Querini, M. and Italiano, G. F. (2014). Reliability and Data Density in High Capacity Color Barcodes. Computer Science and Information Systems, 11(4), 1595-1615. * Querini, M., Grillo, A., Lentini, A., and Italiano, G. F. (2011). 2D Color Barcodes for Mobile Phones. IJCSA, 8(1), 136-155. * Querini, M. (2010). Analysis and Design of High-Capacity Two-Dimensional Codes. Development of the Reader for Desktop and Mobile Environments (Bilingual Digital Edition 2026, Version 1.0). Zenodo. https://doi.org/10.5281/zenodo.22206722 Notice: This application is an independent personal project and is not affiliated with any organization or institution.

About

Logn

Read full description

Logn is a minimal ambient sound app built for deep focus, quiet reading, sleep preparation, thinking, and everyday sound masking. Choose one of five evolving modes and let Logn create a slow-moving soundscape using layered drones, subtle binaural tones, stretched loop textures, soft drift, filtering, reverb, and gentle stereo movement. Each mode has its own character, designed to stay calm and unobtrusive while still feeling alive over time. Modes include: Thinking - spacious tones for calm mental space Working - steady layers for focused sessions Sleeping - slower, softer textures for winding down Reading - light ambience that stays out of the way Masking - fuller background sound for covering distractions The interface is intentionally simple: a glowing control, smooth volume, immersive color, and no clutter. All five modes are free with ads. A one-time Remove Ads purchase removes ads permanently. Audio can continue while your screen is off. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

HCC2D Decoder4 screens
Logn4 screens

Verdict

The call

The clearest difference is in-app purchases: HCC2D Decoder at none against Logn's 1. HCC2D Decoder also leads on ads (none vs shown). Logn's advantage is update cadence (weekly vs every 2 weeks). On price, device support and iOS requirement 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. Logn sells 1 one-off in-app purchase. HCC2D Decoder asks for nothing beyond the download.

UpkeepUpdate frequency

HCC2D Decoder ships an update every 2 weeks, Logn weekly. The most recent releases landed on October 31, 2026 and October 29, 2026 respectively.

Scorecard3 real differences · 7 level
HCC2D Decoder versus Logn: the parameters behind the verdict, then further details
ParameterHCC2D DecoderLogn
PriceFreeFree
Rating4.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 2 weeksWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017
Further details — not scored
Size8 MB6 MB
Age rating4+4+
DeveloperMarco QueriniNice Software AS

In-app purchases

None

HCC2D Decoder

No in-app purchases

1 purchases

Logn

One-time1
  • Remove Ads$4.99

Questions

Is HCC2D Decoder free?
HCC2D Decoder is free to download, with no in-app purchases.
Is Logn free?
Logn is free to download, with in-app purchases available.
Do HCC2D Decoder or Logn have ads?
Logn shows ads; HCC2D Decoder does not.
Which is updated more often, HCC2D Decoder or Logn?
HCC2D Decoder ships an update every 2 weeks, and Logn weekly. Most recently, HCC2D Decoder was updated on October 31, 2026 and Logn on October 29, 2026.

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