# Duty vs Ultra Light Performance Tool

The clearest difference is update cadence: Duty at every 3 days against Ultra Light Performance Tool's every 3 months. Ultra Light Performance Tool's advantage is iOS requirement (12.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Duty sells 1 in-app purchase, starting at $1.99 per year and Ultra Light Performance Tool sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Duty ships an update every 3 days, Ultra Light Performance Tool every 3 months. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Duty | Ultra Light Performance Tool |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 3 months |
| Size | 44 MB | 30 MB |
| Requires iOS | 17.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Martin Handl](https://appshunter.io/developer/1202513077) | [Konstantin Ludwig](https://appshunter.io/developer/1642383019) |

## What reviewers say

### Duty

[App page](https://appshunter.io/ios/app/duty-rest/id6450999374)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $1.99 | per year |


### Ultra Light Performance Tool

[App page](https://appshunter.io/ios/app/ultra-light-performance-tool/id6464596500)

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation 1€ | $0.99 | one-time |
| Donation 1€ | $1.99 | one-time |
| Donation 1€ | $3.99 | one-time |
| Donation 1€ | $8.99 | one-time |
| Donation 1€ | $12.99 | one-time |
| Donation 1€ | $17.99 | one-time |
| Donation 1€ | $44.99 | one-time |


## Frequently asked questions

### Is Duty free?

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

### Is Ultra Light Performance Tool free?

Ultra Light Performance Tool is free to download, with in-app purchases available.

### Do Duty or Ultra Light Performance Tool have ads?

Neither Duty nor Ultra Light Performance Tool shows ads.

### Which is updated more often, Duty or Ultra Light Performance Tool?

Duty ships an update every 3 days, and Ultra Light Performance Tool every 3 months. Most recently, Duty was updated on October 27, 2026 and Ultra Light Performance Tool on October 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.*