Comparison

Caffix vs LogZero

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

Head to head
About

Caffix

Features
Read full description

Most people drink caffeine every day, but almost nobody manages it. CafFix changes that.  Tell us your goal, better sleep, sharper energy, or just staying within your daily limit, and we'll build a caffeine plan around your body, your schedule, and your life. Your personalized caffeine limit: Forget the generic "400mg a day" advice. CafFix calculates your exact daily limit based on your body weight and age, so your goal actually means something. Know when to stop automatically: Based on your bedtime, CafFix tells you your caffeine cutoff time every single day. So you stop guessing why you can't fall asleep. Three goals. One app. * Sleep Better - optimize your caffeine cutoff for deeper rest * Optimize Energy - time your intake for peak performance * Just Track It - stay under your daily safety limit Always with you: Live Activities on your lock screen and a home screen widget mean you never have to open the app to know where you stand. Built around your week: Different bedtime on weekends? CafFix adapts your caffeine windows day by day. Finally, a caffeine tracker that works as hard as your morning coffee.

About

LogZero

This app allows you to track various aspects of your life, including mood, habits, food, exercise, and medication, all on your device. It focuses on privacy and security, offering insights into your data without collecting or sharing it.

Highlights
  • Mood tracking with emotions and gratitude
  • Food logging with macro and nutrient tracking
  • Weight tracking with goal setting
  • Exercise logging and impact analysis
  • Todo list management
  • Medication adherence tracking
  • Data correlation and insights
Features
Read full description

Track Everything. Share Nothing. LogZero is the all-in-one private life tracker for mood, habits, food, weight, exercise, meditation, medication, todos and more. Everything stays on your iPhone. No ads. No cloud. No accounts. No analytics. LogZero has security and privacy integrated into it's DNA. LogZero is built by Andrew Hoffman, LLC — owned by Andrew Hoffman: a cybersecurity architect, author and educator. ONE OFFLINE APP FOR YOUR ENTIRE DAY Mood module — multi-step daily entries with emotions, activities, gratitude notes, and free-form text. The depth of a private diary, the speed of a tap. Food module — daily recording of macros against your own targets. Can be configured to track additional vitamins, nutrients and supplements. Scan labels or log manually. Weight module — log weight over time, set goals, configure charts for easier data review. Exercise module — log workout minutes rapidly and build data to see how your workouts impact your mood and weight. Todo module — prioritized, filterable cross-day tasks with tags, completion trends, and a planning view. Meditation module — daily meditation tracking tied to correlations module to show it's impact on your mood. Medication module — schedule medication and supplement protocols, adherence tracking, prescription refill reminders and more. Correlation module — analyze data from all the other modules to draw insights into what is impacting your weight, mood and behavior. Correlation module — the most important insights from the other modules, charted, configurable and readable at at glance. 100% PRIVATE. 100% ON-DEVICE. LogZero has no servers. None. Every entry — every mood, meal, weight, symptom, medication dose, and meditation minute lives on your device and nowhere else. We can't see your data by design, and this sets our app apart from almost every competitor. No Data Collected — verified by Apple's privacy label No account required No ads. No telemetry. No third-party SDKs. Works fully offline — designed for airplane mode, weak signal, and people who explore beyond the bounds of cellular internet Full data export to CSV or JSON, anytime with optional encryption using AES-256 If you've moved away from other apps because of privacy or security concerns, LogZero is the app you are looking for. Privacy and security are baked into LogZero's DNA. SEE THE PATTERNS, NOT JUST THE ENTRIES LogZero's correlation engine surfaces relationships between your trackers: how exercise shifts your mood, what foods line up with weight changes, which activities precede your best days. The kind of analysis a cloud app uses your data to build, but instead done entirely on your phone, for your eyes only. LOGZERO PRO Free is genuinely useful — every tracker works end-to-end without paying. Pro unlocks deeper analytics, biometric & passcode support, encrypted backups, and personalization controls. $4.99/month — low-commitment, cancel anytime $34.99/year — best value, save ~42% $99 lifetime — pay once, own it forever (regularly $149) Cancel anytime in iOS Settings. WHY LOGZERO EXISTS Most wellness apps make money by selling your data, serving you ads, creating artificial scarcity, sending you to affiliate links and so on. LogZero's only revenue is your subscription. That's the entire business model — and the reason your data never leaves your phone. Track everything. Share nothing. LEGAL INFORMATION Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://logzero.app/privacy/#policy

Screenshots

Caffix4 screens
LogZero4 screens

Verdict

The call

The clearest difference is in-app purchases: Caffix at none against LogZero's 3. LogZero's advantage is update cadence (every 5 days vs every 3 weeks) and iOS requirement (16.4 vs 26.0). On price, ads and device support 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

Both are free to download. LogZero sells 3 in-app purchases, starting at $5.00 per month. Caffix asks for nothing beyond the download.

UpkeepUpdate frequency

Caffix ships an update every 3 weeks, LogZero every 5 days. The most recent releases landed on September 22, 2026 and September 18, 2026 respectively.

Scorecard3 real differences · 7 level
Caffix versus LogZero: the parameters behind the verdict, then further details
ParameterCaffixLogZero
PriceFreeFree
Rating—5.0 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—8 — better
Update frequencyEvery 3 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhone, iPad — betteriPhone
Requires iOS26.016.4 — better
Further details — not scored
Size314 MB8 MB
Age rating17+4+
DeveloperTunde Timea BarthaAndrew Hoffman, LLC

In-app purchases

None

Caffix

No in-app purchases

3 purchases

LogZero

Subscriptions2
  • LogZero Pro — Monthly$5.001 Month
  • LogZero Pro — Annual$35.001 Year
One-time1
  • LogZero Pro — Lifetime$99.00

Questions

Is Caffix free?
Caffix is free to download, with no in-app purchases.
Is LogZero free?
LogZero is free to download, with in-app purchases available.
Do Caffix or LogZero have ads?
Neither Caffix nor LogZero shows ads.
Which is updated more often, Caffix or LogZero?
Caffix ships an update every 3 weeks, and LogZero every 5 days. Most recently, Caffix was updated on September 22, 2026 and LogZero on September 18, 2026.

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