Comparison

BACtrack vs Children Diary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

BACtrack

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
Read full description

Transform your iPhone into a breathalyzer with BACtrack®! Enjoy a modern design, easier navigation, and a smoother overall experience with a lot more updates to come. Easily estimate your BAC (Blood Alcohol Content) with a BACtrack smartphone breathalyzer and this free companion app. Designed by BACtrack, the leading manufacturer of personal and professional breathalyzers, this app connects to your device wirelessly via Bluetooth®, and allows you to measure your alcohol level with the award-winning BACtrack Mobile, BACtrack C6, and BACtrack C8 smart breathalyzers. BACtrack makes it easy to understand how alcohol affects the body, empowering you to make smarter, more informed decisions. In this version of the BACtrack app: • Pairing is automatic once you turn on your BACtrack and open the app; results are communicated via Bluetooth® to display on your iPhone. • Quickly and easily estimate your BAC and read safety information about corresponding impairment levels. • ZeroLine® estimates when your BAC will return to 0.00%. • Saved BAC readings allow you to get a clear picture of your drinking habits. • Track your BAC data using Apple Health. The most trusted brand of breathalyzers on the market, BACtrack has been featured in Fast Company and CNET. Download now and test your BAC anywhere, anytime!

About

Children Diary

Features
Read full description

Children Diary keeps your child’s story in one thoughtful, personal place designed to last. It is more than an album: it connects the small facts of today with the person they are becoming. TODAY, WITHOUT MISSING A THING Keep appointments, quick actions, recent measurements, expiring documents and new memories close at hand. Every child has their own profile and history. A COMPLETE CHILDHOOD ARCHIVE • Growth: height, weight, head circumference, shoe size and custom measurements, with trends over time. • Health: visits, vaccinations, allergies, medication, tests and episodes, presented as a personal record, not a diagnostic tool. • Teeth: a visual map for first teeth, lost teeth, permanent teeth and treatment. • School and activities: school years, teachers, interests, achievements and related materials. • Documents and appointments: everything important, with visible reminders and expiry dates. MEMORIES WITH THEIR CONTEXT INTACT Save photos, videos, audio, drawings, quotes, trips, first times, birthdays, diary pages and letters for the future. Add a date, place, story and attachments so each memory will still mean something years from now. A STORY TO RETURN TO The timeline brings growth, school, health and memories together automatically. Global search finds a teacher, measurement, document or quote in seconds. When you are ready, choose the chapters and create a PDF book of their childhood. PRIVATE BY DESIGN Children Diary has no advertising, content analytics or proprietary account. Data stays on the device and, when iCloud is available, in your private iCloud database. Share a child’s profile with family through Apple invitations, with view-only or editing permission. App Lock can use Face ID, Touch ID or the device passcode. For families with more than one child, Children Diary keeps every story separate but always close. Remembering should not require perfect organization. It should only require being there.

Screenshots

BACtrack4 screens
Children Diary4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard2 real differences · 8 level
BACtrack versus Children Diary: the parameters behind the verdict, then further details
ParameterBACtrackChildren Diary
PriceFree — better$4.99
Rating4.2 (1.5K ratings) — better—
Positive reviews26.9% of reviews—
Number of ratings1.5K — better—
Update frequencyEvery 2 weeksEvery 9 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhoneiPhone, iPad — better
Requires iOS18.018.0
Further details — not scored
Size81 MB7 MB
Age rating17+4+
DeveloperKHN Solutions IncValgy

Bugs and requests

BACtrack

Reported bugs

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

Requested features

6 requests
  • Bring back Apple Watch app
  • More drink options
  • Countdown timer for blowing
  • Ability to add custom drinks
  • Battery level indicator
Show 1 more
  • Improved history tracking and data management

Children Diary

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

BACtrack

Subscriptions2
  • BACtrack+1 Year trial$39.991 Year
  • BACtrack+1 Month trial$39.991 Year
None

Children Diary

No in-app purchases

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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