Comparison

Gluk vs Cal Diary

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

Head to head
About

Gluk

Features
Read full description

Gluk transforms how you track hydration with our science-based HP (Hydration Point) system. BEYOND SIMPLE WATER TRACKING Most apps count glasses of water. Gluk calculates your TRUE hydration contribution from every beverage - because a cup of coffee hydrates differently than a glass of water. THE HP SYSTEM Our Hydration Point algorithm is based on the Beverage Hydration Index (BHI) research. Each drink you log shows: - Actual hydration contribution (not just volume) - Mineral intake (Na, K, Mg, Ca) - Progress toward your personalized daily goal TRACK 6 POPULAR BEVERAGES - Water & Mineral Water - Filter Coffee & Americano - Latte - Black Tea FEATURES - Quick logging in under 3 taps - Daily HP score and progress tracking - Weekly and monthly analytics - Streak tracking to build healthy habits - Smart reminders to stay hydrated - Works offline - syncs when connected PERSONALIZED GOALS Your daily hydration target is calculated based on your body weight, giving you a goal that actually makes sense for you. PRIVACY FIRST Your health data stays private. We don't sell your information. Start understanding your hydration today with Gluk.

About

Cal Diary

Features
Read full description

Cal Diary turns calorie tracking into a 3-second snap. No spreadsheet apps. No 50,000-food database to scroll. Just photo, log, done. - Photograph your meal and AI estimates calories and macros - Daily protein, carb, fat targets - TDEE calculator (Mifflin-St Jeor, 5 activity levels) - Cut, maintain, or bulk goals (+/- 500 kcal) - Manual entry when precision matters - Weight log with weekly and monthly trend - Clean monochrome design, no ads, no feed, no clutter - 8-step setup, under 2 minutes Privacy-first: on-device storage. No account required. Privacy Policy: https://andriimakarevych.com/calories-counter/privacy Terms of Use: https://andriimakarevych.com/calories-counter/terms

Screenshots

Gluk4 screens
Cal Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: Gluk at none against Cal Diary's 3. Gluk also leads on iOS requirement (13.0 vs 18.0). Cal Diary's advantage is update cadence (every 3 days vs every 2 weeks). On price, ads and device support there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Cal Diary sells 3 in-app purchases, starting at $4.99 per 7 days. Gluk asks for nothing beyond the download.

UpkeepUpdate frequency

Gluk ships an update every 2 weeks, Cal Diary every 3 days. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

Scorecard3 real differences ยท 3 level
Gluk versus Cal Diary: the parameters behind the verdict, then further details
ParameterGlukCal Diary
PriceFreeFree
Update frequencyEvery 2 weeksEvery 3 days โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPod โ€” betteriPhone
Requires iOS13.0 โ€” better18.0
Further details โ€” not scored
Size54 MB15 MB
Age rating4+4+
DeveloperPCI Yazilim Danismanlik ve Organizasyon Ltd. Sti.Andrii Makarevych

In-app purchases

None

Gluk

No in-app purchases

3 purchases

Cal Diary

Subscriptions3
  • Weekly Premium3 Days trial$4.997 Days
  • Monthly Premium$11.991 Month
  • Annual Premium$49.991 Year

Questions

Is Gluk free?
Gluk is free to download, with no in-app purchases.
Is Cal Diary free?
Cal Diary is free to download, with in-app purchases available.
Do Gluk or Cal Diary have ads?
Neither Gluk nor Cal Diary shows ads.
Which is updated more often, Gluk or Cal Diary?
Gluk ships an update every 2 weeks, and Cal Diary every 3 days. Most recently, Gluk was updated on October 28, 2026 and Cal Diary on November 5, 2026.

Other comparisons