Comparison

fourf vs ZenLog

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

Head to head
About

fourf

Capture thoughts, memories, and routines effortlessly with this journaling app. Its chat-like interface and social features allow for shared memories and easy organization across devices. Build a consistent habit with reminders and customizable appearance.

Highlights
  • Chat-like journaling interface
  • Mention friends for shared memories
  • Single-tap routine tracking
  • Effortless organization and search
  • Multi-device compatibility
  • Customizable appearance
  • Journaling habit reminders
Features
Read full description

Experience effortless memory keeping with FFFF, a journaling app designed to transform your daily reflections into a smooth and interactive experience. Our intuitive interface allows you to effortlessly capture thoughts, memories, and routines, keeping your life organized and connected. Journaling Made Simple: • Start writing immediately with a chat-like screen, minimizing distractions and making it easy to capture every moment. Socially Connected Memories: • Mention friends and family in your entries to create shared memories. Notifications keep everyone in the loop, turning journaling into a collaborative activity. Routine Tracking: • Log your daily routines with a single tap, integrating them seamlessly into your journal entries. Effortless Organization: • Keep all your thoughts and memories in one place, free from distractions, and easily searchable. Multi-Device Compatibility: • Enjoy a seamless experience across your iPhone, iPad, and Mac, ensuring your journal is always within reach. Customizable Appearance: • Personalize the look and feel of your journal to match your style and preferences. Build a Consistent Journaling Habit: • Set a reminder and receive notifications to help you maintain a regular journaling practice. Download FFFF today and start your journey towards enriched memory keeping!

About

ZenLog

Read full description

Habits that last, without even noticing ZenLog is designed to make daily logging effortless and natural. No more hassle, no more forgetting — every step of the recording process is carefully crafted to feel smooth and intuitive. Bring together all kinds of data stored on your iPhone into one place, so you can see your life at a glance. With Apple Intelligence, AI summarizes your daily records, turning them into meaningful reflections. Optimized for iOS26 with a beautiful, modern design, ZenLog will continue to evolve with you. Start building habits that truly last — naturally, with ZenLog. *** Features *** ・Activity & Habit Tracking Create experiences you want to turn into habits in advance, or use templates to get started. You can choose between two modes: recording only the moment you start, or recording both start and end times. By setting tags, your data will be automatically categorized for analysis. ・Easy Logging Once you’ve registered your activities, recording is just one tap away. If an activity has tags, you can select them when starting a log. ・Detailed Statistics Get detailed statistics such as frequency, active days, breakdown by weekdays, and time slots. These insights help keep you motivated to stay consistent. ・AI-Powered Reports On Apple Intelligence–enabled devices, you’ll receive AI-generated reports. They summarize your daily records, making it easy to reflect on what kind of day you had. ・Integration with Various Data Your iPhone stores a wealth of experiences and daily activities. Photos and Health data can be displayed on your weekly timeline, giving you a more vivid picture of your day. ・Quick Logging with Apple Watch Record instantly, right when you want to, directly from your Apple Watch. ・Optimized for iOS 26 This app is available exclusively on devices running iOS 26 or later. *** Subscription – All Features, One Price *** A subscription is required to use ZenLog. With a single, flat rate, you can access all features. A free trial is available, so feel free to try it out first. After the trial ends, the fee will be charged to your Apple ID. If you do not wish to continue, please make sure to cancel your subscription before the trial period ends. Terms of Use (Apple Standard EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

fourf4 screens
ZenLog4 screens

Verdict

The call

The clearest difference is in-app purchases: fourf at none against ZenLog's 1. fourf also leads on iOS requirement (17.4 vs 26.0). ZenLog's advantage is update cadence (every 2 days vs every 5 days). 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. ZenLog sells 1 in-app purchase, starting at $3.99 per month. fourf asks for nothing beyond the download.

UpkeepUpdate frequency

fourf ships an update every 5 days, ZenLog every 2 days. The most recent releases landed on October 15, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 5 level
fourf versus ZenLog: the parameters behind the verdict, then further details
ParameterfourfZenLog
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 5 daysEvery 2 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.4 — better26.0
Further details — not scored
Size5 MB11 MB
Age rating17+4+
DeveloperSalih Bora OzturkYutaka Ino

In-app purchases

None

fourf

No in-app purchases

1 purchases

ZenLog

Subscriptions1
  • Monthly Plan14 Days trial$3.991 Month

Questions

Is fourf free?
fourf is free to download, with no in-app purchases.
Is ZenLog free?
ZenLog is free to download, with in-app purchases available.
Do fourf or ZenLog have ads?
Neither fourf nor ZenLog shows ads.
Which is updated more often, fourf or ZenLog?
fourf ships an update every 5 days, and ZenLog every 2 days. Most recently, fourf was updated on October 15, 2026 and ZenLog on October 11, 2026.

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