# Smart Solar vs Eink Clock

The clearest difference is update cadence: Eink Clock at every 4 days against Smart Solar's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Smart Solar ships an update every 6 weeks, Eink Clock every 4 days. The most recent releases landed on September 16, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Smart Solar | Eink Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 4 days** |
| Monetization | Free | — |
| Size | 30 MB | 36 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anh Tuan Nguyen](https://appshunter.io/developer/1782902125) | [VAN NGUYEN DAO](https://appshunter.io/developer/1633273032) |

## What reviewers say

### Smart Solar

[App page](https://appshunter.io/ios/app/smart-solar/id6738919484)

Monitor and manage your solar energy devices with this application. It currently supports specific MPPT chargers and inverters, providing insights into your solar energy system's performance.

**Highlights:** Solar device management, Energy monitoring, MPPT Charger support, Inverter GTIL2-Sun support, Performance insights

**Features:** macOS Compatibility

**In-app purchases:** none


### Eink Clock

[App page](https://appshunter.io/ios/app/eink-clock/id6779846224)

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

**In-app purchases:** none


## Frequently asked questions

### Is Smart Solar free?

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

### Is Eink Clock free?

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

### Do Smart Solar or Eink Clock have ads?

Neither Smart Solar nor Eink Clock shows ads.

### Which is updated more often, Smart Solar or Eink Clock?

Smart Solar ships an update every 6 weeks, and Eink Clock every 4 days. Most recently, Smart Solar was updated on September 16, 2026 and Eink Clock on September 29, 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.*