# Idioms and Expressions vs Pendulum Lab

The clearest difference is in-app purchases: Idioms and Expressions at none against Pendulum Lab's 1. Pendulum Lab's advantage is price ($0.99 vs $1.99). On update cadence, ads, device support and iOS requirement there is nothing between them.

Idioms and Expressions costs $1.99 and Pendulum Lab $0.99 up front. Pendulum Lab sells 1 one-off in-app purchase. Idioms and Expressions asks for nothing beyond the download.

Idioms and Expressions ships an update every 2 months, Pendulum Lab every 5 weeks. The most recent releases landed on October 27, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Idioms and Expressions | Pendulum Lab |
| --- | --- | --- |
| Price | $1.99 | **$0.99** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 110 MB | 4 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Esteban Lopez](https://appshunter.io/developer/1507954500) | [hyeonsu jeong](https://appshunter.io/developer/1628268684) |

## What reviewers say

### Idioms and Expressions

[App page](https://appshunter.io/ios/app/idioms-and-expressions/id1521743695)

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

**In-app purchases:** none


### Pendulum Lab

[App page](https://appshunter.io/ios/app/pendulum-lab/id6661026555)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Triple Pendulum Unlock | $0.99 | one-time |


## Frequently asked questions

### Is Idioms and Expressions free?

Idioms and Expressions costs $1.99, with no in-app purchases.

### Is Pendulum Lab free?

Pendulum Lab costs $0.99, and also offers in-app purchases.

### Do Idioms and Expressions or Pendulum Lab have ads?

Neither Idioms and Expressions nor Pendulum Lab shows ads.

### Which is updated more often, Idioms and Expressions or Pendulum Lab?

Idioms and Expressions ships an update every 2 months, and Pendulum Lab every 5 weeks. Most recently, Idioms and Expressions was updated on October 27, 2026 and Pendulum Lab on October 20, 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.*