# PHEM Logger vs On

The clearest difference is price: On at Free against PHEM Logger's $4.99. PHEM Logger's advantage is in-app purchases (none vs 1). On review sentiment, update cadence, ads and device support there is nothing between them.

On is free to download; PHEM Logger costs $4.99 up front. On sells 1 one-off in-app purchase. PHEM Logger asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. Both last shipped on October 8, 2026.

## The numbers

| Metric | PHEM Logger | On |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Paid | **Free** |
| Size | 10 MB | 8 MB |
| Requires iOS | 17.6 | 17.6 |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [David Freeman](https://appshunter.io/developer/1896617767) | [Mohsin Asad Sadiq](https://appshunter.io/developer/1896638622) |

## What reviewers say

### PHEM Logger

[App page](https://appshunter.io/ios/app/phem-logger/id6768947913)

This tool accurately timestamps critical events in pre-hospital emergency medicine. It supports clinical governance, documentation, and post-incident audits with glove-friendly, single-handed operation. It logs job timings, medications, interventions, and cardiac arrest events.

**Highlights:** Job timing capture, Medication logging with frequency counting, Intervention timestamping, Cardiac arrest event logging, ATMIST handover note building, Customizable settings, Simulation ready

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### On

[App page](https://appshunter.io/ios/app/on-call/id6769200317)

Manage on-call shifts and track medical jobs efficiently. Prioritize workload, generate handover summaries instantly, and ensure data privacy with local storage. Designed by a doctor for fast, secure use during busy shifts.

**Highlights:** Track urgent and routine jobs, Prioritize workload, Generate structured handover summaries, Secure local data storage, Face ID protection, Fast and intuitive interface

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Buy me a coffee | $2.99 | one-time |


## Frequently asked questions

### Is PHEM Logger free?

PHEM Logger costs $4.99, with no in-app purchases.

### Is On free?

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

### Do PHEM Logger or On have ads?

Neither PHEM Logger nor On shows ads.

### Which is updated more often, PHEM Logger or On?

PHEM Logger ships an update weekly, and On weekly. Most recently, PHEM Logger was updated on October 8, 2026 and On on October 8, 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.*