# IPSDI Exposure Tracker vs Kairos

The clearest difference is in-app purchases: IPSDI Exposure Tracker at none against Kairos's 2. IPSDI Exposure Tracker also leads on update cadence (every 8 days vs every 3 weeks) and ratings volume (38 vs 3). On price, rating, ads and device support there is nothing between them.

Both are free to download. Kairos sells 2 in-app purchases, starting at $4.99 per month. IPSDI Exposure Tracker asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for IPSDI Exposure Tracker against 5.0 for Kairos. That said, the two scores are not equally well evidenced: IPSDI Exposure Tracker has 38 ratings behind it against 3, so its average is the more settled of the two.

IPSDI Exposure Tracker ships an update every 8 days, Kairos every 3 weeks. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | IPSDI Exposure Tracker | Kairos |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (38 ratings)](https://appshunter.io/ios/app/ipsdi-exposure-tracker/id1457260349/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/kairos-shift-tracker/id6792157855/reviews)** |
| Number of ratings | **38** | 3 |
| Positive reviews | 55.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 weeks |
| Monetization | **Free** | Subscription |
| Size | 12 MB | 4 MB |
| Requires iOS | **16.0** | 26.5 |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [International Public Safety Data Institute](https://appshunter.io/developer/1457260348) | [BOAZ TIMOTHY WHEALY](https://appshunter.io/developer/6791718585) |

## What reviewers say

### IPSDI Exposure Tracker

[App page](https://appshunter.io/ios/app/ipsdi-exposure-tracker/id1457260349)

This app helps firefighters meticulously record and track personal exposures encountered during their duties. It offers a streamlined interface to document incidents, ensuring a comprehensive record for future reference. Developed by a public safety data science organization, it focuses on the individual exposure event.

**Highlights:** Track individual exposures, Record incident details, Simplified modern interface, Focus on exposure events, Build personal records

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

**In-app purchases:** none


### Kairos

[App page](https://appshunter.io/ios/app/kairos-shift-tracker/id6792157855)

This app helps shift workers and their families stay synchronized by providing a clear, shareable schedule. It allows users to easily track rotations, see real-time duty status, and receive notifications about upcoming shifts. Designed for professionals with complex schedules, it aims to eliminate guesswork and keep everyone informed.

**Highlights:** Shareable shift calendar, Real-time duty status, Customizable shift rotations, Home screen widgets, Apple Watch support, Multiple calendar tracking

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kairos Pro - Monthly | $4.99 | per month |
| Kairos Pro - Yearly | $49.99 | per year |


## Frequently asked questions

### Is IPSDI Exposure Tracker free?

IPSDI Exposure Tracker is free to download, with no in-app purchases.

### Is Kairos free?

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

### Which has better reviews, IPSDI Exposure Tracker or Kairos?

Kairos is rated higher. IPSDI Exposure Tracker averages 4.9 out of 5 from 38 ratings, while Kairos averages 5.0 from 3 ratings.

### Do IPSDI Exposure Tracker or Kairos have ads?

Neither IPSDI Exposure Tracker nor Kairos shows ads.

### Which is updated more often, IPSDI Exposure Tracker or Kairos?

IPSDI Exposure Tracker ships an update every 8 days, and Kairos every 3 weeks. Most recently, IPSDI Exposure Tracker was updated on October 26, 2026 and Kairos on October 29, 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.*