# i自由 vs Coastful

The clearest difference is update cadence: i自由 at every 6 days against Coastful's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. i自由 sells 3 in-app purchases, starting at $0.99 per month and Coastful sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

i自由 ships an update every 6 days, Coastful fortnightly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | i自由 | Coastful |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/coastful-fire-calculator/id6769537698/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 days** | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 42 MB | 12 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [利华 陈](https://appshunter.io/developer/1825131597) | [ZW Studio LLC](https://appshunter.io/developer/1896285113) |

## What reviewers say

### i自由

[App page](https://appshunter.io/ios/app/i/id6748957414)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iFree | $0.99 | per month |
| iFree | $9.99 | per year |
| 会员资格（永久） | $14.99 | one-time |


### Coastful

[App page](https://appshunter.io/ios/app/coastful-fire-calculator/id6769537698)

Calculate your exact retirement or Coast FIRE year based on your real expenses, portfolio allocation, and chosen assumptions. Model inflation, run what-if scenarios, and track your net worth with this offline, privacy-focused financial planning tool.

**Highlights:** Customizable FIRE year projection, Personalized Safe Withdrawal Rate (SWR), Net worth tracking with history, Real-dollar inflation modeling, What-if scenario analysis, Offline functionality, Privacy-focused design

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coastful Pro (Monthly) | $1.99 | per month |
| Coastful Pro (Lifetime) | $19.99 | one-time |


## Frequently asked questions

### Is i自由 free?

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

### Is Coastful free?

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

### Do i自由 or Coastful have ads?

Neither i自由 nor Coastful shows ads.

### Which is updated more often, i自由 or Coastful?

i自由 ships an update every 6 days, and Coastful fortnightly. Most recently, i自由 was updated on October 30, 2026 and Coastful 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.*