# TETRA Charge vs EVON

The clearest difference is update cadence: EVON at every 2 weeks against TETRA Charge's every 3 months. 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.

TETRA Charge ships an update every 3 months, EVON every 2 weeks. The most recent releases landed on September 9, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | TETRA Charge | EVON |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Size | 46 MB | 87 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TETRA SOLUTIONS SH.P.K](https://appshunter.io/developer/1490469337) | [Elmeasure India Pvt Ltd](https://appshunter.io/developer/1254835470) |

## What reviewers say

### TETRA Charge

[App page](https://appshunter.io/ios/app/tetra-charge/id6744439950)

**In-app purchases:** none


### EVON

[App page](https://appshunter.io/ios/app/evon/id6757149159)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is TETRA Charge free?

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

### Is EVON free?

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

### Do TETRA Charge or EVON have ads?

Neither TETRA Charge nor EVON shows ads.

### Which is updated more often, TETRA Charge or EVON?

TETRA Charge ships an update every 3 months, and EVON every 2 weeks. Most recently, TETRA Charge was updated on September 9, 2026 and EVON on September 20, 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.*