# Progress vs IOU Slip

The clearest difference is price: IOU Slip at Free against Progress's $3.99. IOU Slip also leads on rating (5.0 vs 4.0) and review sentiment (100% vs 83%). Progress's advantage is ratings volume (30 vs 2). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

IOU Slip is free to download; Progress costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

IOU Slip holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Progress has 30 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 83% of Progress's written reviews are positive against 100% of IOU Slip's.

Progress ships an update every 2 days, IOU Slip every 4 days. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Progress | IOU Slip |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.0 (30 ratings)](https://appshunter.io/ios/app/progress-check-your-progress/id1531556410/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/iou-slip-promise-tracker/id6758438592/reviews)** |
| Number of ratings | **30** | 2 |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 days |
| Monetization | Free | Free |
| Size | 5 MB | 4 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Gaku Sakai](https://appshunter.io/developer/1382485798) | [GROUPOO PTE. LTD.](https://appshunter.io/developer/1747245669) |

## What reviewers say

### Progress

[App page](https://appshunter.io/ios/app/progress-check-your-progress/id1531556410)

Easily track your progress and countdown to important dates. Set custom periods and visualize remaining days at a glance. Utilize home screen widgets for quick access to your progress updates.

**Highlights:** Set custom periods, Display days remaining, Home screen widgets, Progress visualization, Countdown timer

**Features:** Vision Pro support

**In-app purchases:** none


### IOU Slip

[App page](https://appshunter.io/ios/app/iou-slip-promise-tracker/id6758438592)

This app helps you record personal promises and favors, focusing on relationships and trust rather than monetary debt. It serves as a digital reminder of bonds between people, like offering a massage or a future coffee. It's designed to cherish connections and the spirit of giving.

**Highlights:** Record personal promises, Track favors and bonds, Digital note of promises, Focus on relationships, Reminder of trust

**In-app purchases:** none


## Frequently asked questions

### Is Progress free?

Progress costs $3.99, with no in-app purchases.

### Is IOU Slip free?

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

### Which has better reviews, Progress or IOU Slip?

IOU Slip is rated higher. Progress averages 4.0 out of 5 from 30 ratings, while IOU Slip averages 5.0 from 2 ratings.

### Do Progress or IOU Slip have ads?

Neither Progress nor IOU Slip shows ads.

### Which is updated more often, Progress or IOU Slip?

Progress ships an update every 2 days, and IOU Slip every 4 days. Most recently, Progress was updated on October 24, 2026 and IOU Slip on October 11, 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.*