# Katmer.im vs Lucent

The clearest difference is device support: Lucent at 3 against Katmer.im's 1. Lucent also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 10 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Katmer.im | Lucent |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/katmerim/id6749801768/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 days | Every 10 days |
| Monetization | Free | — |
| Size | 10 MB | 42 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arguman Yapay Zeka Teknolojileri Anonim Sirketi](https://appshunter.io/developer/1832189666) | [Nguyen Trung Kien](https://appshunter.io/developer/1849106734) |

## What reviewers say

### Katmer.im

[App page](https://appshunter.io/ios/app/katmerim/id6749801768)

Organize academic and daily tasks with smart calendar views and secure, encrypted notes. Enhance focus with a built-in Pomodoro timer and access tasks instantly via a home screen widget. Optimized for mobile academic workflows.

**Highlights:** Task management with calendar views, End-to-end encrypted note-taking, Integrated Pomodoro timer, Cloud sync with web account, Home screen widget for quick access, Optimized for academic workflows

**Features:** macOS Compatibility

**In-app purchases:** none


### Lucent

[App page](https://appshunter.io/ios/app/lucent-focus-app/id6754592413)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Katmer.im free?

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

### Is Lucent free?

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

### Do Katmer.im or Lucent have ads?

Neither Katmer.im nor Lucent shows ads.

### Which is updated more often, Katmer.im or Lucent?

Katmer.im ships an update every 10 days, and Lucent every 10 days. Most recently, Katmer.im was updated on October 30, 2026 and Lucent on November 5, 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.*