# Flexi vs osmSolver

The clearest difference is update cadence: Flexi at weekly against osmSolver's every 3 weeks. osmSolver's advantage is iOS requirement (15.5 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flexi sells 4 in-app purchases, starting at $5.99 per month and osmSolver sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Flexi ships an update weekly, osmSolver every 3 weeks. The most recent releases landed on October 30, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Flexi | osmSolver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (138 ratings)](https://appshunter.io/ios/app/flexi-vocabulary-flashcards/id6499282610/reviews)** | — |
| Number of ratings | **138** | — |
| Positive reviews | 76.6% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Freemium | — |
| Size | 82 MB | 22 MB |
| Requires iOS | 18.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [Tomer Beilinson](https://appshunter.io/developer/1743082463) | [Osamu Ushikubo](https://appshunter.io/developer/1883307303) |

## What reviewers say

### Flexi

[App page](https://appshunter.io/ios/app/flexi-vocabulary-flashcards/id6499282610)

Build your vocabulary and master new languages with an AI-powered flashcard system. Create personalized cards, get instant translations and definitions, and utilize spaced repetition for effective long-term memorization. Supports numerous languages and offers offline study options.

**Highlights:** Personalized flashcard creation, AI-powered translations and definitions, Spaced repetition system, Text-to-speech pronunciation, Offline study mode, Progress tracking, CSV import/export

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $5.99 | per month |
| Premium Monthly | $5.99 | per month |
| Premium Annual | $29.99 | per year |
| Premium Lifetime | $99.99 | one-time |


### osmSolver

[App page](https://appshunter.io/ios/app/osmsolver/id6760217572)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| osmSolver LITE | $2.99 | one-time |
| osmSolver PRO | $2.99 | one-time |
| osmSolver PRO (フル版) | $4.99 | one-time |


## Frequently asked questions

### Is Flexi free?

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

### Is osmSolver free?

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

### Do Flexi or osmSolver have ads?

Neither Flexi nor osmSolver shows ads.

### Which is updated more often, Flexi or osmSolver?

Flexi ships an update weekly, and osmSolver every 3 weeks. Most recently, Flexi was updated on October 30, 2026 and osmSolver on October 13, 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.*