# Injection Tracker vs OffShift

The clearest difference is update cadence: OffShift at every 3 weeks against Injection Tracker's every 15 months. Injection Tracker's advantage is device support (4 vs 2) and iOS requirement (15.5 vs 26.1). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Injection Tracker sells 17 in-app purchases, starting at $4.95 per month and OffShift sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Injection Tracker ships an update every 15 months, OffShift every 3 weeks. The most recent releases landed on September 20, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Injection Tracker | OffShift |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 3 weeks** |
| Size | 220 MB | 3 MB |
| Requires iOS | **15.5** | 26.1 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Digital Therapeutics](https://appshunter.io/developer/1721663167) | [JONATHAN ALEXANDER WRIGHT](https://appshunter.io/developer/1853376663) |

## What reviewers say

### Injection Tracker

[App page](https://appshunter.io/ios/app/injection-tracker-glp1/id6743040801)

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| steady pass | $4.95 | per month |
| easy pass | $5.99 | per 7 days |
| flex pass | $8.99 | per month |
| weather max | $9.99 | per 3 months |
| carey ai max | $19.99 | per month |
| yearly access | $19.99 | per year |
| smart pass | $24.99 | per year |
| carey ai ultra | $29.99 | per month |
| plus | $29.99 | per year |
| limited discount | $29.99 | per year |
| Premium Yearly | $34.99 | per year |
| Extended Trial | $39.99 | per year |
| yearly access | $39.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $1.99 | one-time |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $99.00 | one-time |


### OffShift

[App page](https://appshunter.io/ios/app/offshift-shift-work-sleep/id6756209316)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OffShift Pro Monthly | $3.99 | per month |
| OffShift Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Injection Tracker free?

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

### Is OffShift free?

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

### Do Injection Tracker or OffShift have ads?

Neither Injection Tracker nor OffShift shows ads.

### Which is updated more often, Injection Tracker or OffShift?

Injection Tracker ships an update every 15 months, and OffShift every 3 weeks. Most recently, Injection Tracker was updated on September 20, 2026 and OffShift on September 7, 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.*