# Flex vs Vow Prep

The clearest difference is review sentiment: Vow Prep at 100% against Flex's 48%. Vow Prep also leads on rating (5.0 vs 4.2). Flex's advantage is monetization model (free vs free with in-app purchases) and ratings volume (5 vs 1). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Flex sells 6 in-app purchases, starting at $2.99 per month and Vow Prep sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Vow Prep holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Flex has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 48% of Flex's written reviews are positive against 100% of Vow Prep's.

Flex ships an update every 3 weeks, Vow Prep every 2 weeks. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Flex | Vow Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/flex/id1551175364/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/vow-prep-before-you-commit/id6793473280/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 48.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 87 MB | 83 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [MMSPORT](https://appshunter.io/developer/1094277528) | [Thanh My DUONG](https://appshunter.io/developer/1882647935) |

## What reviewers say

### Flex

[App page](https://appshunter.io/ios/app/flex/id1551175364)

This app consolidates workplace wellness services, including gym access, well-being treatments, and electric bike sharing. It allows users to manage gym memberships, book classes, schedule appointments with practitioners, and reserve bikes.

**Highlights:** Gym news and class booking, Well-being and soft medicine services, Appointment scheduling for practitioners, Electric bike sharing and management, Workplace service integration

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Abonnement podcast mensuel | $2.99 | per month |
| Cours en ligne - Mensuel | $4.49 | per month |
| Podcasts annuel | $13.99 | per year |
| Cours en ligne abo annuel | $18.49 | per year |
| Cours en ligne - Annuel | $18.49 | per year |
| Cours en ligne abo annuel | $18.99 | per year |


### Vow Prep

[App page](https://appshunter.io/ios/app/vow-prep-before-you-commit/id6793473280)

This app helps couples about to commit to a life together have essential conversations about their future. It offers guided discussions across various life topics, allowing partners to answer privately and then compare responses to foster open communication.

**Highlights:** Guided conversation cards, 9 topic decks, Private answering, Side-by-side answer comparison, One-time purchase, No subscription required

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vow Prep Premium | $6.99 | one-time |


## Frequently asked questions

### Is Flex free?

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

### Is Vow Prep free?

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

### Which has better reviews, Flex or Vow Prep?

Vow Prep is rated higher. Flex averages 4.2 out of 5 from 5 ratings, while Vow Prep averages 5.0 from 1 ratings.

### Do Flex or Vow Prep have ads?

Neither Flex nor Vow Prep shows ads.

### Which is updated more often, Flex or Vow Prep?

Flex ships an update every 3 weeks, and Vow Prep every 2 weeks. Most recently, Flex was updated on October 18, 2026 and Vow Prep on October 10, 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.*