# ObSort vs Stellar Flow

The clearest difference is in-app purchases: Stellar Flow at none against ObSort's 2. ObSort's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. ObSort sells 2 in-app purchases, starting at $1.99 per month. Stellar Flow asks for nothing beyond the download.

ObSort ships an update every 4 days, Stellar Flow every 3 days. The most recent releases landed on November 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ObSort | Stellar Flow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/stellar-flow-focus-timer/id6757545517/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Monetization | — | Ad-supported |
| Size | 3 MB | 45 MB |
| Requires iOS | **17.6** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Hanquan Liang](https://appshunter.io/developer/1607751967) | [Alexander Heemann](https://appshunter.io/developer/587278115) |

## What reviewers say

### ObSort

[App page](https://appshunter.io/ios/app/obsort/id6753699464)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ObSort Pro Monthly | $1.99 | per month |
| ObSort Pro Lifetime | $4.99 | one-time |


### Stellar Flow

[App page](https://appshunter.io/ios/app/stellar-flow-focus-timer/id6757545517)

Transform focus sessions into an interstellar adventure. Earn resources, upgrade your starship, and explore a vast galaxy as you complete work, study, or meditation missions. Track your progress with detailed statistics and enjoy immersive soundscapes.

**Highlights:** Gamified focus sessions, Galaxy exploration map, Ship upgrading and customization, Immersive ambient soundscapes, Progress tracking and statistics, Live Activities support

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ObSort free?

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

### Is Stellar Flow free?

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

### Do ObSort or Stellar Flow have ads?

Stellar Flow shows ads; ObSort does not.

### Which is updated more often, ObSort or Stellar Flow?

ObSort ships an update every 4 days, and Stellar Flow every 3 days. Most recently, ObSort was updated on November 12, 2026 and Stellar Flow on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*