# Mail Tracer vs KAIROS

The clearest difference is ads: KAIROS at none against Mail Tracer's shown. KAIROS also leads on iOS requirement (12.0 vs 16.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Mail Tracer sells 9 in-app purchases, starting at $1.99 per 7 days and KAIROS sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Mail Tracer | KAIROS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (217 ratings)](https://appshunter.io/ios/app/mail-tracer-email-tracking/id1254940903/reviews)** | — |
| Number of ratings | **217** | — |
| Positive reviews | 18.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 29 MB | 41 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Vaibhav Narula](https://appshunter.io/developer/1116489344) | [Tengri Vertex LLC](https://appshunter.io/developer/1854695149) |

## What reviewers say

### Mail Tracer

[App page](https://appshunter.io/ios/app/mail-tracer-email-tracking/id1254940903)

This app provides advanced email tracking for the iOS Mail app, letting you know if your sent emails have been read, when, and how many times. It also offers insights into the location and device used to access your emails.

**Highlights:** Track email opens, See read times and frequency, View access location and device, Real-time open alerts, Unlimited free tracking

**Features:** Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro - Weekly | $1.99 | per 7 days |
| Pro - Monthly | $3.99 | per month |
| Pro Plan - Monthly | $6.99 | per month |
| Pro Plan - Yearly | $14.99 | per year |
| Pro Plan - Yearly | $19.99 | per year |
| Pro Plan - Yearly | $24.99 | per year |
| Pro Plan - Yearly | $29.99 | per year |
| Pro Plan - Yearly | $39.99 | per year |
| Pro Version - Lifetime | $29.99 | one-time |

**What reviewers like**

- 🚀 Efficient email tracking
- 👍 Simple and easy to use
- 🔒 Secure and private

**What reviewers complain about**

- 🐛 Inconsistent and unreliable tracking
- 💰 Expensive paid version
- 🔍 Limited free version features
- 🤖 Poor customer support

**Reported bugs**

- Frequent crashes and errors
- Compatibility issues with newer iOS versions
- Tracking not working as expected

**Requested features**

- Improved accuracy of location and device tracking
- Ability to track replies and forwards
- Integration with more email clients


### KAIROS

[App page](https://appshunter.io/ios/app/kairos-protocol/id6756001310)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kairos Premium | $9.99 | per year |


## Frequently asked questions

### Is Mail Tracer free?

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

### Is KAIROS free?

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

### Do Mail Tracer or KAIROS have ads?

Mail Tracer shows ads; KAIROS does not.

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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.*