# Charge vs Kastyl

The clearest difference is in-app purchases: Charge at none against Kastyl's 3. Kastyl's advantage is update cadence (every 2 days vs fortnightly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Kastyl sells 3 in-app purchases, starting at $1.99 per month. Charge asks for nothing beyond the download.

Charge ships an update fortnightly, Kastyl every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Charge | Kastyl |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | — |
| Size | 2 MB | 78 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Dusan Baek](https://appshunter.io/developer/1530611513) | [KASTET](https://appshunter.io/developer/6795452376) |

## What reviewers say

### Charge

[App page](https://appshunter.io/ios/app/charge-ai-usage-tracker/id6796766465)

Track your AI coding usage and costs across various providers directly from your iPhone. Monitor your remaining time, weekly caps, and daily spending with at-a-glance widgets and detailed dashboards. Setup is quick, and privacy is prioritized with no access to your code or conversations.

**Highlights:** Rate-limit gauges per provider, Burn-rate forecasts, Cost dashboard (daily, weekly, monthly), Plan badges and account separation, Multi-computer support, Home and Lock Screen widgets, Streak heatmap and cost trend

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

**In-app purchases:** none


### Kastyl

[App page](https://appshunter.io/ios/app/kastyl-ai-usage-tracker/id6805153196)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kastyl Pro Monthly | $1.99 | per month |
| Kastyl Pro — 3 Months | $4.99 | per 3 months |
| Kastyl Pro Yearly | $14.99 | per year |


## Frequently asked questions

### Is Charge free?

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

### Is Kastyl free?

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

### Do Charge or Kastyl have ads?

Neither Charge nor Kastyl shows ads.

### Which is updated more often, Charge or Kastyl?

Charge ships an update fortnightly, and Kastyl every 2 days. Most recently, Charge was updated on October 31, 2026 and Kastyl on October 31, 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.*