Comparison

Weight Diary vs Kilo

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

Head to head
About

Weight Diary

Features
Read full description

Logging your weight takes 3 seconds. Open the app, tap +, done. Weight Diary is the simplest way to track your weight β€” every entry lands on a color-coded calendar, so a whole month of progress is visible at a glance. β€’ Calendar view β€” entries appear as colored cards on each day, turning your month into a picture. β€’ Context tags β€” log up to 5 entries a day, tagged Fasted, After meal, Workout, or Other. β€’ Smart filters β€” show only your fasted weigh-ins to see your true trend. Toggle any context on or off, in both calendar and stats. β€’ Trend charts β€” see your change over 7 days, 1 month, or 3 months, with period change and average at a glance. β€’ BMI β€” calculated automatically from your height and weight, with healthy-range guidance. β€’ Your units β€” switch between kgΒ·cm and lbΒ·ft anytime. β€’ No sign-up β€” everything stays on your device. No account, no ads. [Premium] Unlock 6-month and 1-year trends, plus viewing and editing entries older than 3 months, with a Premium subscription. β€’ Subscriptions renew monthly and can be cancelled anytime in iOS Settings > Apple Account > Subscriptions. Payment is charged to your Apple ID account, and the subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Terms of Use: https://juno1028.github.io/weight-tracker-legal/terms.html Privacy Policy: https://juno1028.github.io/weight-tracker-legal/privacy.html

About

Kilo

Features
Read full description

Kilo is a quiet place to record your weight and see how things change over time. Rather than focusing on a single number, Kilo helps you keep a gentle, consistent record. Log today’s weight, explore your records on the calendar, and look back at your progress on a chart. Set a goal weight to see how far you have come. Choose the days and time for a reminder, so it is easier to keep your routine going. Your records stay on your device, and you can export or import them as a CSV file whenever you need. Kilo keeps things simple, from writing down a record to revisiting it later. There are no ads to get in the way. Features - Record your weight and notes by date - Explore changes on a calendar and chart - View monthly reports and a goal weight - Set reminders for the days and time you choose - Export and import records as CSV files - Protect the app with device authentication - Available in English, Japanese and Korean - An ad-free experience Please note - Weight and notes are stored on your device. - Sharing usage analytics to help improve the app is optional. - Kilo supports personal health tracking and does not replace medical care or professional advice.

Screenshots

Weight Diary4 screens
Kilo4 screens

Verdict

The call

The clearest difference is in-app purchases: Kilo at none against Weight Diary's 1. Kilo also leads on update cadence (fortnightly vs every 5 months). Weight Diary's advantage is iOS requirement (15.6 vs 26.1). On price, ads and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Weight Diary sells 1 in-app purchase, starting at $2.99 per month. Kilo asks for nothing beyond the download.

UpkeepUpdate frequency

Weight Diary ships an update every 5 months, Kilo fortnightly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

Scorecard3 real differences Β· 3 level
Weight Diary versus Kilo: the parameters behind the verdict, then further details
ParameterWeight DiaryKilo
PriceFreeFree
Update frequencyEvery 5 monthsFortnightly β€” better
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, iPod β€” betteriPhone
Requires iOS15.6 β€” better26.1
Further details β€” not scored
Size24 MB19 MB
Age rating4+4+
DeveloperJuno KimJinhyeong Kim

In-app purchases

1 purchases

Weight Diary

Subscriptions1
  • Monthly Subscription$2.991 Month
None

Kilo

No in-app purchases

Questions

Is Weight Diary free?
Weight Diary is free to download, with in-app purchases available.
Is Kilo free?
Kilo is free to download, with no in-app purchases.
Do Weight Diary or Kilo have ads?
Neither Weight Diary nor Kilo shows ads.
Which is updated more often, Weight Diary or Kilo?
Weight Diary ships an update every 5 months, and Kilo fortnightly. Most recently, Weight Diary was updated on October 28, 2026 and Kilo on October 31, 2026.

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