# Langlogy vs SentenceDeck

The clearest difference is ads: SentenceDeck at none against Langlogy's shown. Langlogy's advantage is iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Langlogy sells 4 in-app purchases, starting at $9.99 per month and SentenceDeck sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Langlogy ships an update every 8 months, SentenceDeck every 6 months. The most recent releases landed on September 9, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | Langlogy | SentenceDeck |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 8 months | **Every 6 months** |
| Size | 46 MB | 10 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Antlogy LLC](https://appshunter.io/developer/1746084919) | [奇濂 任](https://appshunter.io/developer/1843376248) |

## What reviewers say

### Langlogy

[App page](https://appshunter.io/ios/app/langlogy/id6502602976)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dual Explorer Monthly | $9.99 | per month |
| Polyglot Passport Monthly | $19.99 | per month |
| Dual Explorer Yearly | $99.99 | per year |
| Polyglot Passport Yearly | $199.99 | per year |


### SentenceDeck

[App page](https://appshunter.io/ios/app/sentencedeck-shadowing/id6759489049)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Credits 100 | $0.99 | one-time |
| Credits 500 | $3.99 | one-time |
| Credits 1200 | $7.99 | one-time |


## Frequently asked questions

### Is Langlogy free?

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

### Is SentenceDeck free?

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

### Do Langlogy or SentenceDeck have ads?

Langlogy shows ads; SentenceDeck does not.

### Which is updated more often, Langlogy or SentenceDeck?

Langlogy ships an update every 8 months, and SentenceDeck every 6 months. Most recently, Langlogy was updated on September 9, 2026 and SentenceDeck on August 30, 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.*