# Steady vs 100日ダイエットAI

The clearest difference is review sentiment: Steady at 60% against 100日ダイエットAI's 0%. 100日ダイエットAI's advantage is ads (none vs shown). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Steady sells 1 in-app purchase, starting at $2.99 per year and 100日ダイエットAI sells 4 in-app purchases, starting at $5.99 per year. Whichever you choose, the download price is not the number that matters.

Steady ships an update every 4 weeks, 100日ダイエットAI fortnightly. The most recent releases landed on September 18, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Steady | 100日ダイエットAI |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Freemium | Freemium |
| Size | 14 MB | 31 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Naia Inc.](https://appshunter.io/developer/1179685788) | [株式会社オポチュニティ](https://appshunter.io/developer/1740927723) |

## What reviewers say

### Steady

[App page](https://appshunter.io/ios/app/steady-simple-diet-note/id6503644140)

This app helps you manage your health and diet by easily tracking daily weight, body fat, meals, exercise, and more. Visualize your progress with graphs and calendar views, and sync data with Apple Health for seamless integration. Secure your data with cloud backup and passcode lock.

**Highlights:** Daily weight and body fat tracking, Meal logging with photos, Exercise and period tracking, Progress graphs and calendar view, Apple Health integration, Cloud backup and passcode lock, Input reminders

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per year |


### 100日ダイエットAI

[App page](https://appshunter.io/ios/app/100ai/id6739611540)

Effortlessly track your diet and health with AI-powered photo analysis. Automatically calculate calories, monitor nutritional balance, and receive personalized advice to achieve your weight goals without the hassle of manual input.

**Highlights:** AI calorie and PFC analysis from photos, Nutritional balance scoring, Daily/weekly diet and weight reports, Weight and BMI tracking with graphs, Personalized diet plans, Food item ranking, AI-driven improvement advice

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 食事改善プレミアムプラン(年額) | $5.99 | per year |
| 食事改善プレミアムプラン（年額） | $11.99 | per year |
| 食事改善プラン(永久版) | $5.99 | one-time |
| 食事改善プラン（永久版） | $14.99 | one-time |


## Frequently asked questions

### Is Steady free?

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

### Is 100日ダイエットAI free?

100日ダイエットAI is free to download, with in-app purchases available.

### Do Steady or 100日ダイエットAI have ads?

Steady shows ads; 100日ダイエットAI does not.

### Which is updated more often, Steady or 100日ダイエットAI?

Steady ships an update every 4 weeks, and 100日ダイエットAI fortnightly. Most recently, Steady was updated on September 18, 2026 and 100日ダイエットAI on September 17, 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.*