# The Sustainer vs MAVI evZAPP

The clearest difference is update cadence: MAVI evZAPP at every 3 weeks against The Sustainer's every 8 months. The Sustainer's advantage is iOS requirement (13.0 vs 15.6). 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.

The Sustainer ships an update every 8 months, MAVI evZAPP every 3 weeks. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | The Sustainer | MAVI evZAPP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 3 weeks** |
| Size | 64 MB | 94 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [ENVO-SUSTAINER PRIVATE LIMITED](https://appshunter.io/developer/1680880040) | [Mavi Green Energy](https://appshunter.io/developer/1723295261) |

## What reviewers say

### The Sustainer

[App page](https://appshunter.io/ios/app/the-sustainer/id6447298071)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### MAVI evZAPP

[App page](https://appshunter.io/ios/app/mavi-evzapp/id6475075996)

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

**In-app purchases:** none


## Frequently asked questions

### Is The Sustainer free?

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

### Is MAVI evZAPP free?

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

### Do The Sustainer or MAVI evZAPP have ads?

Neither The Sustainer nor MAVI evZAPP shows ads.

### Which is updated more often, The Sustainer or MAVI evZAPP?

The Sustainer ships an update every 8 months, and MAVI evZAPP every 3 weeks. Most recently, The Sustainer was updated on October 3, 2026 and MAVI evZAPP on October 12, 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.*