# SunTech vs Zlerts

The clearest difference is update cadence: SunTech at every 2 weeks against Zlerts's every 5 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.

SunTech ships an update every 2 weeks, Zlerts every 5 weeks. Both last shipped on November 8, 2026.

## The numbers

| Metric | SunTech | Zlerts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Size | 116 MB | 43 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Lalit Singh](https://appshunter.io/developer/1754155296) | [Shivang Pandya](https://appshunter.io/developer/1602815420) |

## What reviewers say

### SunTech

[App page](https://appshunter.io/ios/app/suntech-clean-solar-panel/id6504866923)

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

**In-app purchases:** none


### Zlerts

[App page](https://appshunter.io/ios/app/zlerts/id6744931771)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SunTech free?

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

### Is Zlerts free?

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

### Do SunTech or Zlerts have ads?

Neither SunTech nor Zlerts shows ads.

### Which is updated more often, SunTech or Zlerts?

SunTech ships an update every 2 weeks, and Zlerts every 5 weeks. Most recently, SunTech was updated on November 8, 2026 and Zlerts on November 8, 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.*