# Flex vs Lumis

The clearest difference is update cadence: Lumis at fortnightly against Flex's every 3 months. Flex's advantage is device support (3 vs 1) and iOS requirement (13.4 vs 26.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Flex sells 2 in-app purchases, starting at $13.99 per month and Lumis sells 1 in-app purchase, starting at $19.99 per year. Whichever you choose, the download price is not the number that matters.

Flex ships an update every 3 months, Lumis fortnightly. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Flex | Lumis |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 70 MB | 9 MB |
| Requires iOS | **13.4** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [CAPNKLUTCH](https://appshunter.io/developer/1772032590) | [David Ellis](https://appshunter.io/developer/1896519854) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex-stretch/id6736611703)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $13.99 | per month |
| Premium Annual | $39.99 | per year |


### Lumis

[App page](https://appshunter.io/ios/app/lumis-glp-1-tracker/id6767912608)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lumis Premium | $19.99 | per year |


## Frequently asked questions

### Is Flex free?

Flex is free to download, with in-app purchases available.

### Is Lumis free?

Lumis is free to download, with in-app purchases available.

### Do Flex or Lumis have ads?

Neither Flex nor Lumis shows ads.

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

Flex ships an update every 3 months, and Lumis fortnightly. Most recently, Flex was updated on November 8, 2026 and Lumis on November 5, 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.*