# SoStack vs Rndvu

The clearest difference is in-app purchases: SoStack at none against Rndvu's 2. SoStack also leads on iOS requirement (15.1 vs 26.0). Rndvu's advantage is update cadence (every 5 days vs every 3 weeks). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Rndvu sells 2 in-app purchases, starting at $3.99 per month. SoStack asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SoStack against 5.0 for Rndvu. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

SoStack ships an update every 3 weeks, Rndvu every 5 days. The most recent releases landed on October 10, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SoStack | Rndvu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/sostack/id6759353874/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/rndvu/id6765571441/reviews) |
| Number of ratings | **3** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Free | Free |
| Size | 43 MB | 61 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 12+ | 12+ |
| Developer | [SOSTACK LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1878252494) | [Rndvu, Inc.](https://appshunter.io/developer/1895997703) |

## What reviewers say

### 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


### Rndvu

[App page](https://appshunter.io/ios/app/rndvu/id6765571441)

Organize group activities and stay connected with friends. Create private communities for your clubs and plan events with integrated chat, polls, and RSVPs. Share calendars to easily coordinate schedules.

**Highlights:** Create private communities, Plan events with RSVPs, Event-specific chat threads, Integrated polls for decision-making, Shared calendars for availability, Real-time chat and photo sharing

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Rndvu Premium Monthly | $3.99 | per month |
| Rndvu Premium Annual | $39.99 | per year |


## Frequently asked questions

### Is SoStack free?

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

### Is Rndvu free?

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

### Which has better reviews, SoStack or Rndvu?

SoStack and Rndvu are both rated 5.0 out of 5 on the App Store, from 3 and 2 ratings respectively.

### Do SoStack or Rndvu have ads?

Neither SoStack nor Rndvu shows ads.

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

SoStack ships an update every 3 weeks, and Rndvu every 5 days. Most recently, SoStack was updated on October 10, 2026 and Rndvu on October 16, 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.*