# Immunization Record Tracker vs PetVaxLog

The clearest difference is update cadence: PetVaxLog at every 4 days against Immunization Record Tracker's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Immunization Record Tracker ships an update every 4 months, PetVaxLog every 4 days. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Immunization Record Tracker | PetVaxLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 4 days** |
| Size | 3 MB | 8 MB |
| Requires iOS | 17.0 | 17 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | +4 | 4+ |
| Developer | [LEAN ASIA CO., LTD](https://appshunter.io/developer/1815050814) | [长贵 周](https://appshunter.io/developer/6779968395) |

## What reviewers say

### Immunization Record Tracker

[App page](https://appshunter.io/ios/app/immunization-record-tracker/id6772256048)

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

**In-app purchases:** none


### PetVaxLog

[App page](https://appshunter.io/ios/app/petvaxlog/id6785357269)

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

**In-app purchases:** none


## Frequently asked questions

### Is Immunization Record Tracker free?

Immunization Record Tracker is free to download, with no in-app purchases.

### Is PetVaxLog free?

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

### Do Immunization Record Tracker or PetVaxLog have ads?

Neither Immunization Record Tracker nor PetVaxLog shows ads.

### Which is updated more often, Immunization Record Tracker or PetVaxLog?

Immunization Record Tracker ships an update every 4 months, and PetVaxLog every 4 days. Most recently, Immunization Record Tracker was updated on October 17, 2026 and PetVaxLog on October 12, 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.*