# Flex vs Ener

The clearest difference is update cadence: Ener at daily against Flex's every 8 days. Ener also leads on device support (3 vs 1). On price, ads, in-app purchases and iOS requirement there is nothing between them.

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

Flex ships an update every 8 days, Ener daily. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Flex | Ener |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Daily** |
| Size | 103 MB | 55 MB |
| Requires iOS | 16.6 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SaasOffice](https://appshunter.io/developer/1751239151) | [Semaforlabs](https://appshunter.io/developer/1789544151) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex-o/id1622172433)

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

**In-app purchases:** none


### Ener

[App page](https://appshunter.io/ios/app/ener/id6478837089)

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

**In-app purchases:** none


## Frequently asked questions

### Is Flex free?

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

### Is Ener free?

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

### Do Flex or Ener have ads?

Neither Flex nor Ener shows ads.

### Which is updated more often, Flex or Ener?

Flex ships an update every 8 days, and Ener daily. Most recently, Flex was updated on October 14, 2026 and Ener 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.*