# Klouto vs SoStack

The clearest difference is in-app purchases: SoStack at none against Klouto's 9. SoStack also leads on ads (none vs shown). Klouto's advantage is update cadence (every 10 days vs every 3 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Klouto sells 9 one-off in-app purchases. SoStack asks for nothing beyond the download.

Klouto ships an update every 10 days, SoStack every 3 weeks. Both last shipped on October 10, 2026.

## The numbers

| Metric | Klouto | SoStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/sostack/id6759353874/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | — | Free |
| Size | 177 MB | 43 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Chukwuemeka Osuofia](https://appshunter.io/developer/1850172012) | [SOSTACK LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1878252494) |

## What reviewers say

### Klouto

[App page](https://appshunter.io/ios/app/klouto/id6754806629)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRIMEATE | $0.99 | one-time |
| Signature | $0.99 | one-time |
| Scholar | $0.99 | one-time |
| Star 1 | $0.99 | one-time |
| Star 2 | $0.99 | one-time |
| 5-min Chat Plan | $0.99 | one-time |
| 10mins Chat Plan | $2.99 | one-time |
| Limited | $3.99 | one-time |
| 30mins Chat Plan | $9.99 | one-time |


### SoStack

[App page](https://appshunter.io/ios/app/sostack/id6759353874)

This app facilitates group communication and coordination with private chats and shared calendars. Plan events, manage RSVPs, and discover local public groups for updates. It prioritizes user control and privacy with in-app account deletion.

**Highlights:** Private group messaging, Shared calendars and events, RSVP and planning tools, Follow verified public groups, Invite via SMS, Location-based discovery

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

**In-app purchases:** none


## Frequently asked questions

### Is Klouto free?

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

### Is SoStack free?

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

### Do Klouto or SoStack have ads?

Klouto shows ads; SoStack does not.

### Which is updated more often, Klouto or SoStack?

Klouto ships an update every 10 days, and SoStack every 3 weeks. Most recently, Klouto was updated on October 10, 2026 and SoStack on October 10, 2026.

---

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