# Did You Know.. vs Lanma

The clearest difference is device support: Lanma at 3 against Did You Know..'s 1. Lanma also leads on iOS requirement (15.1 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Did You Know.. sells 1 one-off in-app purchase and Lanma sells 4 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Did You Know.. | Lanma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/did-you-know/id6761013561/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | Every 5 days |
| Monetization | Free with in-app purchases | — |
| Size | 4 MB | 62 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [柏生 杨](https://appshunter.io/developer/1887198371) | [ETHEIA LLC](https://appshunter.io/developer/1891084642) |

## What reviewers say

### Did You Know..

[App page](https://appshunter.io/ios/app/did-you-know/id6761013561)

Discover fascinating facts across various subjects in a quick and engaging format. This app delivers bite-sized insights without lengthy reading or pressure, making learning accessible and memorable.

**Highlights:** Short, impactful facts, Bite-sized learning, Covers science, psychology, history, Engaging swipe interface, No long reading required

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Unlimited Facts | $3.99 | one-time |


### Lanma

[App page](https://appshunter.io/ios/app/lanma-learn-languages/id6761719477)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lanma Pro | $4.99 | per month |
| Lanma Premium | $9.99 | per month |
| Lanma Pro | $49.99 | per year |
| Lanma Premium | $99.99 | per year |


## Frequently asked questions

### Is Did You Know.. free?

Did You Know.. is free to download, with in-app purchases available.

### Is Lanma free?

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

### Do Did You Know.. or Lanma have ads?

Neither Did You Know.. nor Lanma shows ads.

### Which is updated more often, Did You Know.. or Lanma?

Did You Know.. ships an update every 5 days, and Lanma every 5 days. Most recently, Did You Know.. was updated on October 31, 2026 and Lanma on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*