# single line diary vs JSI One

The clearest difference is ads: JSI One at none against single line diary's shown. JSI One also leads on update cadence (every 3 weeks vs every 6 months). single line diary's advantage is iOS requirement (6.0 vs 13.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

single line diary ships an update every 6 months, JSI One every 3 weeks. The most recent releases landed on October 11, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | single line diary | JSI One |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Ad-supported | — |
| Size | 4 MB | 213 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Công Ty TNHH Chứng Khoán Nhật Bản](https://appshunter.io/developer/1835855177) |

## What reviewers say

### single line diary

[App page](https://appshunter.io/ios/app/single-line-diary/id564585722)

A simple daily journal app that allows you to record entries from 62 days in the past up to tomorrow. It features a checkbox for each day and lets you customize the start of your week to Sunday or Monday.

**Highlights:** Daily single line entries, Checkbox for each day, Customizable week start (Sunday/Monday), Date range: 62 days prior to tomorrow

**In-app purchases:** none


### JSI One

[App page](https://appshunter.io/ios/app/jsi-one/id6751571648)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is single line diary free?

single line diary is free to download, with no in-app purchases.

### Is JSI One free?

JSI One is free to download, with no in-app purchases.

### Do single line diary or JSI One have ads?

single line diary shows ads; JSI One does not.

### Which is updated more often, single line diary or JSI One?

single line diary ships an update every 6 months, and JSI One every 3 weeks. Most recently, single line diary was updated on October 11, 2026 and JSI One on September 29, 2026.

---

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