# SGK e vs Challbit

The clearest difference is in-app purchases: SGK e at none against Challbit's 3. Challbit's advantage is update cadence (every 5 weeks vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Challbit sells 3 in-app purchases, starting at $0.99 per month. SGK e asks for nothing beyond the download.

SGK e ships an update every 4 months, Challbit every 5 weeks. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SGK e | Challbit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 weeks** |
| Size | 58 MB | 78 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Instalaxmi Private Limited](https://appshunter.io/developer/1623763280) | [Han Byul Yang](https://appshunter.io/developer/1798491961) |

## What reviewers say

### SGK e

[App page](https://appshunter.io/ios/app/sgk-e-gold/id6443599460)

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

**In-app purchases:** none


### Challbit

[App page](https://appshunter.io/ios/app/challbit-ai-habit-tracker/id6742456135)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium 3Month | $2.79 | per 3 months |
| Premium Yearly | $10.90 | per year |


## Frequently asked questions

### Is SGK e free?

SGK e is free to download, with no in-app purchases.

### Is Challbit free?

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

### Do SGK e or Challbit have ads?

Neither SGK e nor Challbit shows ads.

### Which is updated more often, SGK e or Challbit?

SGK e ships an update every 4 months, and Challbit every 5 weeks. Most recently, SGK e was updated on October 25, 2026 and Challbit on October 24, 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.*