# Sanwex S500 vs OnWa Last Seen Chat Tracker

The clearest difference is in-app purchases: Sanwex S500 at none against OnWa Last Seen Chat Tracker's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. OnWa Last Seen Chat Tracker sells 4 in-app purchases, starting at $3.99 per 7 days. Sanwex S500 asks for nothing beyond the download.

Sanwex S500 ships an update monthly, OnWa Last Seen Chat Tracker every 2 months. The most recent releases landed on October 13, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Sanwex S500 | OnWa Last Seen Chat Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.2 (39 ratings)](https://appshunter.io/ios/app/onwa-last-seen-chat-tracker/id6751362929/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 71 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Zarrin Benyamin](https://appshunter.io/developer/1199559487) | [Enes Unal](https://appshunter.io/developer/1486149233) |

## What reviewers say

### Sanwex S500

[App page](https://appshunter.io/ios/app/sanwex-s500/id6742316632)

**Features:** macOS Compatibility

**In-app purchases:** none


### OnWa Last Seen Chat Tracker

[App page](https://appshunter.io/ios/app/onwa-last-seen-chat-tracker/id6751362929)

This app monitors WhatsApp online and offline activity for up to 10 contacts. It provides real-time alerts, detailed reports on login times, duration, and frequency of use. The service prioritizes user privacy by only using publicly available data.

**Highlights:** WhatsApp online/offline tracking, Real-time alerts for activity, Track up to 10 users, Detailed daily reports and statistics, View past activity history, Privacy-focused data handling

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OnWa Weekly Subscription | $3.99 | per 7 days |
| OnWa Weekly Subscription | $4.99 | per 7 days |
| OnWa Monthly Subscription | $7.99 | per month |
| OnWa Monthly Subscription | $9.99 | per month |


## Frequently asked questions

### Is Sanwex S500 free?

Sanwex S500 is free to download, with no in-app purchases.

### Is OnWa Last Seen Chat Tracker free?

OnWa Last Seen Chat Tracker is free to download, with in-app purchases available.

### Do Sanwex S500 or OnWa Last Seen Chat Tracker have ads?

Neither Sanwex S500 nor OnWa Last Seen Chat Tracker shows ads.

### Which is updated more often, Sanwex S500 or OnWa Last Seen Chat Tracker?

Sanwex S500 ships an update monthly, and OnWa Last Seen Chat Tracker every 2 months. Most recently, Sanwex S500 was updated on October 13, 2026 and OnWa Last Seen Chat Tracker on October 24, 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.*