# One Diary! vs Tomi dB

The clearest difference is in-app purchases: Tomi dB at none against One Diary!'s 3. Tomi dB also leads on ads (none vs shown) and review sentiment (100% vs 91%). One Diary!'s advantage is update cadence (fortnightly vs every 14 months) and chart position (#134 vs unranked). On price and device support there is nothing between them.

One Diary! costs $0.99 and Tomi dB $0.29 up front. One Diary! sells 3 one-off in-app purchases. Tomi dB asks for nothing beyond the download.

One Diary! ships an update fortnightly, Tomi dB every 14 months. The most recent releases landed on October 26, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | One Diary! | Tomi dB |
| --- | --- | --- |
| Price | $0.99 | **$0.29** |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/one-diary/id1359597080/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 91.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 14 months |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | **#134** | — |
| Size | 57 MB | 5 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [岚 甘](https://appshunter.io/developer/1228166609) | [翔宇 孟](https://appshunter.io/developer/1666443091) |

## What reviewers say

### One Diary!

[App page](https://appshunter.io/ios/app/one-diary/id1359597080)

**Currently charting:** #134 Top Paid · Lifestyle (US App Store)

Easily record your daily life with beautiful templates and summaries. This app helps you build a habit of journaling, offers secure storage, and allows sharing your memories.

**Highlights:** Daily diary entries, Beautiful diary templates, Cloud backup and sync, Shareable diary cards, Daily writing reminders, Password protection, PDF export

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| cup of drink | $0.99 | one-time |
| doughnut | $1.99 | one-time |
| steak | $4.99 | one-time |


### Tomi dB

[App page](https://appshunter.io/ios/app/tomi-dbsound-decibel-meter/id6445875391)

This app visualizes sound levels with a cute, animated character that reacts to noise. It logs high-decibel events and provides historical analytics to help monitor and manage noise disturbances in various settings.

**Highlights:** Real-time cartoon feedback, Noise event tracker, Automatic logging of high-decibel events, Noise pattern identification, Historical noise analytics, Voice recording for noise control

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is One Diary! free?

One Diary! costs $0.99, and also offers in-app purchases.

### Is Tomi dB free?

Tomi dB costs $0.29, with no in-app purchases.

### Do One Diary! or Tomi dB have ads?

One Diary! shows ads; Tomi dB does not.

### Which is updated more often, One Diary! or Tomi dB?

One Diary! ships an update fortnightly, and Tomi dB every 14 months. Most recently, One Diary! was updated on October 26, 2026 and Tomi dB on October 12, 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.*