# 3J iSmart vs Solis

The clearest difference is in-app purchases: 3J iSmart at none against Solis's 4. 3J iSmart also leads on iOS requirement (13.0 vs 26.2). Solis's advantage is update cadence (weekly vs every 26 months). On price, ads and device support there is nothing between them.

Both are free to download. Solis sells 4 in-app purchases, starting at $2.99 per month. 3J iSmart asks for nothing beyond the download.

3J iSmart ships an update every 26 months, Solis weekly. The most recent releases landed on October 5, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | 3J iSmart | Solis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 26 months | **Weekly** |
| Size | 187 MB | 14 MB |
| Requires iOS | **13.0** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TLI INTERNATION PTY Ltd](https://appshunter.io/developer/1725279629) | [Ben Davin](https://appshunter.io/developer/6777220263) |

## What reviewers say

### 3J iSmart

[App page](https://appshunter.io/ios/app/3j-ismart/id6475813294)

**Features:** macOS Compatibility

**In-app purchases:** none


### Solis

[App page](https://appshunter.io/ios/app/solis-sun-hours/id6777219991)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Solis Monthly | $2.99 | per month |
| Solis Weekly | $4.99 | per 7 days |
| Solis Annual | $29.99 | per year |
| Solis Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is 3J iSmart free?

3J iSmart is free to download, with no in-app purchases.

### Is Solis free?

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

### Do 3J iSmart or Solis have ads?

Neither 3J iSmart nor Solis shows ads.

### Which is updated more often, 3J iSmart or Solis?

3J iSmart ships an update every 26 months, and Solis weekly. Most recently, 3J iSmart was updated on October 5, 2026 and Solis on October 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.*