# Letterbox vs Kasane

The clearest difference is rating: Kasane at 5.0 against Letterbox's 4.5. Kasane also leads on in-app purchases (none vs 3) and update cadence (daily vs every 6 months). Letterbox's advantage is ratings volume (4 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Letterbox sells 3 one-off in-app purchases. Kasane asks for nothing beyond the download.

Kasane holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

Letterbox ships an update every 6 months, Kasane daily. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Letterbox | Kasane |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/letterbox-open-when-letters/id6736516126/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kasane-comic-reader/id6802585922/reviews)** |
| Number of ratings | **4** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 21 MB | 17 MB |
| Requires iOS | 17 | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Sajjad Alhusseini](https://appshunter.io/developer/1718074256) | [晨康 周](https://appshunter.io/developer/6802102947) |

## What reviewers say

### Letterbox

[App page](https://appshunter.io/ios/app/letterbox-open-when-letters/id6736516126)

Send personalized digital "Open When" letters to friends and loved ones. Customize letters with colors, fonts, and images to create unique messages for any occasion. Perfect for long-distance relationships and thoughtful gestures.

**Highlights:** Send personalized digital letters, Customize letter colors and fonts, Attach images to letters, Create "Open When" themed letters, Suitable for friends and partners

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Special Box | $1.99 | one-time |
| Cute Box | $3.99 | one-time |
| Love Box | $5.99 | one-time |


### Kasane

[App page](https://appshunter.io/ios/app/kasane-comic-reader/id6802585922)

Consolidate your scattered comic resources into a single, seamless library. Access and manage comics from local storage or remote servers with an elegant interface. Enjoy a fluid, immersive reading experience with support for multiple formats and advanced viewing options.

**Highlights:** Aggregate multiple comic sources, Local comic management with metadata support, OPDS 1.2 & 2.0 protocol compatibility, Supports Komga, Kavita servers, CBZ, PDF, EPUB format support, Dual-page reading mode, Smart wide-image cutting

**In-app purchases:** none


## Frequently asked questions

### Is Letterbox free?

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

### Is Kasane free?

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

### Which has better reviews, Letterbox or Kasane?

Kasane is rated higher. Letterbox averages 4.5 out of 5 from 4 ratings, while Kasane averages 5.0 from 1 ratings.

### Do Letterbox or Kasane have ads?

Neither Letterbox nor Kasane shows ads.

### Which is updated more often, Letterbox or Kasane?

Letterbox ships an update every 6 months, and Kasane daily. Most recently, Letterbox was updated on October 13, 2026 and Kasane on September 30, 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.*