# AutoDiary+ vs ZenLog

The clearest difference is update cadence: ZenLog at every 2 days against AutoDiary+'s every 2 months. AutoDiary+'s advantage is iOS requirement (15.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AutoDiary+ sells 3 in-app purchases, starting at $2.49 per month and ZenLog sells 1 in-app purchase, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

AutoDiary+ ships an update every 2 months, ZenLog every 2 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | AutoDiary+ | ZenLog |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 71.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 49 MB | 11 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Writeback Co.,Ltd.](https://appshunter.io/developer/382508339) | [Yutaka Ino](https://appshunter.io/developer/1780101465) |

## What reviewers say

### AutoDiary+

[App page](https://appshunter.io/ios/app/autodiary-plus/id1478718334)

This app helps you track your movements, recording where and when you go. Add notes, photos, and voice memos to locations, and analyze your time spent at different places with detailed graphs. It also monitors data usage and battery life, with optional integration for step counting.

**Highlights:** Location tracking with timestamps, Add photos, notes, and voice memos, Movement analysis and daily/monthly graphs, Mobile data and battery usage monitoring, Step counting integration with iPhone Health, Power-efficient GPS usage

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 自動計測-延長１ヶ月間 | $2.49 | per month |
| 自動計測-延長半年間 | $11.99 | per 6 months |
| 自動計測-延長１年間 | $20.49 | per year |


### 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 AutoDiary+ free?

AutoDiary+ is free to download, with in-app purchases available.

### Is ZenLog free?

ZenLog is free to download, with in-app purchases available.

### Do AutoDiary+ or ZenLog have ads?

Neither AutoDiary+ nor ZenLog shows ads.

### Which is updated more often, AutoDiary+ or ZenLog?

AutoDiary+ ships an update every 2 months, and ZenLog every 2 days. Most recently, AutoDiary+ was updated on October 24, 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.*