# BACtrack vs Children Diary

The clearest difference is price: BACtrack at Free against Children Diary's $4.99. Children Diary's advantage is in-app purchases (none vs 2). On update cadence, ads, device support and iOS requirement there is nothing between them.

BACtrack is free to download; Children Diary costs $4.99 up front. BACtrack sells 2 in-app purchases, starting at $39.99 per year. Children Diary asks for nothing beyond the download.

BACtrack ships an update every 2 weeks, Children Diary every 9 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | BACtrack | Children Diary |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.2 (1.5K ratings)](https://appshunter.io/ios/app/bactrack/id553347498/reviews)** | — |
| Number of ratings | **1.5K** | — |
| Positive reviews | 26.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 7 MB |
| Requires iOS | 18.0 | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [KHN Solutions Inc](https://appshunter.io/developer/553347501) | [Valgy](https://appshunter.io/developer/464576000) |

## What reviewers say

### BACtrack

[App page](https://appshunter.io/ios/app/bactrack/id553347498)

Turn your iPhone into a breathalyzer with this app. It connects wirelessly to compatible devices to estimate your Blood Alcohol Content (BAC) and provides safety information. Track your drinking habits and understand how alcohol affects your body to make informed decisions.

**Highlights:** Estimate Blood Alcohol Content (BAC), Connects wirelessly via Bluetooth, Displays BAC results on iPhone, Provides safety information on impairment, ZeroLine® estimates BAC return to 0.00%, Save BAC readings to track habits, Integrates with Apple Health

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| BACtrack+ | $39.99 | per year |
| BACtrack+ | $39.99 | per year |

**What reviewers like**

- 💡 Helpful yardstick
- 🚀 Works as expected
- 👍 Great product

**What reviewers complain about**

- 🐛 App crashes or doesn't work
- 🔋 Battery issues
- 🔒 Privacy concerns with required account
- 👎 App updates make it worse
- 👎 Inconsistent or inaccurate readings

**Reported bugs**

- App won't get past registration screen
- Firmware update issues
- Bluetooth connectivity problems
- App crashes or freezes

**Requested features**

- Bring back Apple Watch app
- More drink options
- Countdown timer for blowing
- Ability to add custom drinks
- Battery level indicator


### Children Diary

[App page](https://appshunter.io/ios/app/children-diary/id6805601767)

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

**In-app purchases:** none


## Frequently asked questions

### Is BACtrack free?

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

### Is Children Diary free?

Children Diary costs $4.99, with no in-app purchases.

### Do BACtrack or Children Diary have ads?

Neither BACtrack nor Children Diary shows ads.

### Which is updated more often, BACtrack or Children Diary?

BACtrack ships an update every 2 weeks, and Children Diary every 9 days. Most recently, BACtrack was updated on November 2, 2026 and Children Diary on November 2, 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.*