# IOU vs Flipsentry

The clearest difference is in-app purchases: IOU at none against Flipsentry's 3. Flipsentry's advantage is ads (none vs shown) and review sentiment (100% vs 83%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Flipsentry sells 3 in-app purchases, starting at $34.99 per month. IOU asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for IOU against 5.0 for Flipsentry. Both are backed by a comparable volume of ratings — 8 and 13 respectively. Written reviews are what separate them: 83% of IOU's written reviews are positive against 100% of Flipsentry's.

IOU ships an update every 4 days, Flipsentry weekly. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | IOU | Flipsentry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (8 ratings)](https://appshunter.io/ios/app/iou-marker/id6746040680/reviews) | [5.0 (13 ratings)](https://appshunter.io/ios/app/flipsentry/id6748539654/reviews) |
| Number of ratings | 8 | **13** |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 148 MB | 87 MB |
| Requires iOS | 18.4 | **16.4** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 17+ |
| Developer | [IOU Marker](https://appshunter.io/developer/1814814238) | [Quantra Tech](https://appshunter.io/developer/1826156021) |

## What reviewers say

### IOU

[App page](https://appshunter.io/ios/app/iou-marker/id6746040680)

Create professional agreements and manage payments effortlessly. Draft documents using AI, e-sign, and track invoices and due dates in one organized platform. Secure sign-in ensures your data is protected.

**Highlights:** AI-powered agreement drafting, E-signature functionality, Payment and invoice management, Due date reminders, Dispute tracking, Secure sign-in

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

**In-app purchases:** none


### Flipsentry

[App page](https://appshunter.io/ios/app/flipsentry/id6748539654)

This app helps resellers and bargain hunters find profitable deals on Facebook Marketplace. It continuously scans listings and sends instant notifications for new items matching your custom criteria, allowing you to act fast and secure the best opportunities before others.

**Highlights:** Continuous marketplace scanning, Fast push notifications, Smart filtering with keywords and price, Custom search radius, Multiple search alerts, User-friendly interface

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Subscription | $34.99 | per month |
| Flipsentry Master Subscription | $49.99 | per 7 days |
| Hunter Plan Subscription | $99.99 | per month |


## Frequently asked questions

### Is IOU free?

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

### Is Flipsentry free?

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

### Which has better reviews, IOU or Flipsentry?

IOU and Flipsentry are both rated 5.0 out of 5 on the App Store, from 8 and 13 ratings respectively.

### Do IOU or Flipsentry have ads?

IOU shows ads; Flipsentry does not.

### Which is updated more often, IOU or Flipsentry?

IOU ships an update every 4 days, and Flipsentry weekly. Most recently, IOU was updated on September 24, 2026 and Flipsentry on September 23, 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.*