# Watt vs odd

The clearest difference is in-app purchases: Watt at none against odd's 2. odd's advantage is update cadence (every 4 days vs every 3 weeks). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. odd sells 2 in-app purchases, starting at $24.99 per year. Watt asks for nothing beyond the download.

Watt ships an update every 3 weeks, odd every 4 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Watt | odd |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/watt/id6753959943/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Monetization | **Free** | Freemium |
| Size | 80 MB | 11 MB |
| Requires iOS | **17.2** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Watt Labs Inc.](https://appshunter.io/developer/1755609265) | [Konstantin Shmykov](https://appshunter.io/developer/1693020939) |

## What reviewers say

### Watt

[App page](https://appshunter.io/ios/app/watt/id6753959943)

Visualize your daily activities and understand how they impact your energy and well-being. Connect your devices for automatic data and gain insights to make smarter life decisions. See the full picture of your lifestyle to live with intention.

**Highlights:** Complete lifestyle visualization, Vitality and energy tracking, Connection between lifestyle and energy, Daily check-ins for awareness, Automatic data flow from devices, Pattern visualization over time

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

**In-app purchases:** none


### odd

[App page](https://appshunter.io/ios/app/odd-one-day-diary/id6806759626)

This app allows you to create a daily journal with a single photo and a few words. It features unique animal stickers to express your mood and a calendar view to revisit past entries. Sync your journal across devices using iCloud and secure it with Face ID.

**Highlights:** Daily photo and text entries, Expressive animal stickers, Calendar view of past entries, iCloud synchronization, Face ID security, Home screen widgets

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| odd Pro for a year | $24.99 | per year |
| odd Pro Forever | $49.99 | one-time |


## Frequently asked questions

### Is Watt free?

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

### Is odd free?

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

### Do Watt or odd have ads?

Neither Watt nor odd shows ads.

### Which is updated more often, Watt or odd?

Watt ships an update every 3 weeks, and odd every 4 days. Most recently, Watt was updated on November 5, 2026 and odd on October 31, 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.*