# Zetlog vs Prolens

The clearest difference is in-app purchases: Prolens at none against Zetlog's 8. Prolens also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (15.1 vs 17.4). On price, ads and device support there is nothing between them.

Both are free to download. Zetlog sells 8 in-app purchases, starting at $2.99 per 7 days. Prolens asks for nothing beyond the download.

Zetlog ships an update every 3 weeks, Prolens weekly. The most recent releases landed on October 24, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Zetlog | Prolens |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (15 ratings)](https://appshunter.io/ios/app/zetlog-online-tracker/id6445889775/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 15.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 47 MB | 25 MB |
| Requires iOS | 17.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [SUPERSKY APPS LIMITED](https://appshunter.io/developer/1625601592) | [Baku Creative Project MMC](https://appshunter.io/developer/1689804891) |

## What reviewers say

### Zetlog

[App page](https://appshunter.io/ios/app/zetlog-online-tracker/id6445889775)

This app allows you to monitor your online activity and track when contacts go online or offline. It functions as an activity monitor for your digital presence. Review the terms and privacy policy for usage details.

**Highlights:** Monitor online activity, Track online status, Track offline status, Activity monitoring, Status tracking

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Weekly 3 | $4.99 | per 7 days |
| Weekly 5 | $6.99 | per 7 days |
| Monthly | $8.99 | per month |
| Monthly 3 | $14.99 | per month |
| Monthly 5 | $19.99 | per month |
| Extra 1 Number | $2.99 | one-time |
| Extra 2 Numbers | $3.99 | one-time |


### Prolens

[App page](https://appshunter.io/ios/app/prolens/id6741173142)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zetlog free?

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

### Is Prolens free?

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

### Do Zetlog or Prolens have ads?

Neither Zetlog nor Prolens shows ads.

### Which is updated more often, Zetlog or Prolens?

Zetlog ships an update every 3 weeks, and Prolens weekly. Most recently, Zetlog was updated on October 24, 2026 and Prolens on October 17, 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.*