# Lumi Tracker vs Osmium Chat

The clearest difference is in-app purchases: Osmium Chat at none against Lumi Tracker's 4. Osmium Chat also leads on ads (none vs shown). Lumi Tracker's advantage is update cadence (every 2 days vs every 2 weeks) and device support (3 vs 1). On price there is nothing between them.

Both are free to download. Lumi Tracker sells 4 in-app purchases, starting at $1.49 per month. Osmium Chat asks for nothing beyond the download.

Lumi Tracker ships an update every 2 days, Osmium Chat every 2 weeks. Both last shipped on October 7, 2026.

## The numbers

| Metric | Lumi Tracker | Osmium Chat |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (5 ratings)](https://appshunter.io/ios/app/osmium-chat/id6770574724/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 2 weeks |
| Monetization | — | Free |
| Size | 64 MB | 71 MB |
| Requires iOS | **15.1** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 12+ | +12 |
| Developer | [Andre Castro Lopes Ltda](https://appshunter.io/developer/1828799887) | [Uncollapse](https://appshunter.io/developer/1895975075) |

## What reviewers say

### Lumi Tracker

[App page](https://appshunter.io/ios/app/lumi-tracker/id6762065352)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumi Pro Monthly | $1.49 | per month |
| Lumi Curator Monthly | $2.49 | per month |
| Lumi Pro Annual | $13.99 | per year |
| Lumi Curator Annual | $21.99 | per year |


### Osmium Chat

[App page](https://appshunter.io/ios/app/osmium-chat/id6770574724)

Experience fast, reliable, and private messaging with a global server network. This app offers a free, public API for developers and is independently owned with a privacy-first approach, ensuring no ads or data harvesting.

**Highlights:** Fast global messaging, Reliable on unstable connections, Private data infrastructure, Free public API for developers, No ads or data harvesting

**In-app purchases:** none


## Frequently asked questions

### Is Lumi Tracker free?

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

### Is Osmium Chat free?

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

### Do Lumi Tracker or Osmium Chat have ads?

Lumi Tracker shows ads; Osmium Chat does not.

### Which is updated more often, Lumi Tracker or Osmium Chat?

Lumi Tracker ships an update every 2 days, and Osmium Chat every 2 weeks. Most recently, Lumi Tracker was updated on October 7, 2026 and Osmium Chat on October 7, 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.*