# fourf vs ZenLog

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.

Both are free to download. ZenLog sells 1 in-app purchase, starting at $3.99 per month. fourf asks for nothing beyond the download.

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.

## The numbers

| Metric | fourf | ZenLog |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Monetization | Free | — |
| Size | 5 MB | 11 MB |
| Requires iOS | **17.4** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [Salih Bora Ozturk](https://appshunter.io/developer/1729658833) | [Yutaka Ino](https://appshunter.io/developer/1780101465) |

## What reviewers say

### fourf

[App page](https://appshunter.io/ios/app/fourf/id6503328526)

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:** macOS Compatibility

**In-app purchases:** none


### ZenLog

[App page](https://appshunter.io/ios/app/zenlog-habit-tracker/id6752211819)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $3.99 | per month |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*