# LUMEN vs Todak Time

The clearest difference is in-app purchases: LUMEN at none against Todak Time's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Todak Time sells 1 one-off in-app purchase. LUMEN asks for nothing beyond the download.

LUMEN ships an update every 9 days, Todak Time every 5 days. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | LUMEN | Todak Time |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/todak-time-study-timer/id6764000666/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 8 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jaewhan Namkoong](https://appshunter.io/developer/1872906976) | [Hyeon mo Gu](https://appshunter.io/developer/1869352261) |

## What reviewers say

### LUMEN

[App page](https://appshunter.io/ios/app/lumen/id6758431652)

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

**In-app purchases:** none


### Todak Time

[App page](https://appshunter.io/ios/app/todak-time-study-timer/id6764000666)

This app helps you focus on your studies by tracking your time spent on each subject. It offers features like customizable goals, app blocking, and progress visualization to keep you on track. Plan your study sessions and monitor your progress with ease.

**Highlights:** Track study time by subject, Customizable goals and reminders, App blocking, Study planner with notes, Lock screen controls, Progress visualization (charts, heatmaps), Exam countdowns, Home screen widget

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Todak Time Pro | $2.99 | one-time |


## Frequently asked questions

### Is LUMEN free?

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

### Is Todak Time free?

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

### Do LUMEN or Todak Time have ads?

Neither LUMEN nor Todak Time shows ads.

### Which is updated more often, LUMEN or Todak Time?

LUMEN ships an update every 9 days, and Todak Time every 5 days. Most recently, LUMEN was updated on September 18, 2026 and Todak Time on September 17, 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.*