# Oappso Stamp vs Portable Inventory

The clearest difference is rating: Oappso Stamp at 5.0 against Portable Inventory's 4.1. Oappso Stamp also leads on in-app purchases (none vs 3) and review sentiment (100% vs 73%). Portable Inventory's advantage is ratings volume (220 vs 2) and update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. Portable Inventory sells 3 one-off in-app purchases. Oappso Stamp asks for nothing beyond the download.

Oappso Stamp holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Portable Inventory has 220 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 100% of Oappso Stamp's written reviews are positive against 73% of Portable Inventory's.

Oappso Stamp ships an update every 3 months, Portable Inventory every 3 weeks. The most recent releases landed on September 8, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Oappso Stamp | Portable Inventory |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/oappso-stamp/id1281978413/reviews)** | [4.1 (220 ratings)](https://appshunter.io/ios/app/portable-inventory/id1440455104/reviews) |
| Number of ratings | 2 | **220** |
| Positive reviews | **100.0% of reviews** | 72.6% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 4 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Phonebase LTD](https://appshunter.io/developer/938688509) | [Chengdu Wangqi03 Technology Ltd.](https://appshunter.io/developer/706772908) |

## What reviewers say

### Oappso Stamp

[App page](https://appshunter.io/ios/app/oappso-stamp/id1281978413)

Create and manage digital loyalty cards for your customers. This app allows you to easily add stamps and redeem rewards, keeping you logged in for seamless access. Stay informed with the latest news and updates directly on your device.

**Highlights:** Create loyalty cards, Add stamps and redeem rewards, Stay logged in, Unlimited stamping, Enable customer info, Receive latest news

**Features:** macOS Compatibility

**In-app purchases:** none


### Portable Inventory

[App page](https://appshunter.io/ios/app/portable-inventory/id1440455104)

Easily track the quantity of any items, from personal belongings to business inventory. Set warning levels and organize items into groups for quick visual identification. Monitor item changes and view detailed statistics and rankings.

**Highlights:** Track item counts, Set warning levels, Organize items by groups, Visual item status indicators, View item statistics and rankings, Change log for items and groups, iCloud synchronization

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Complete Version | $1.99 | one-time |
| Pro Version | $7.29 | one-time |
| Pro Version | $9.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🚀 Efficient inventory tracking
- 💡 Customizable color coding
- 👍 Clean and intuitive UI

**What reviewers complain about**

- 🐛 Occasional crashes and data loss
- 🔀 Difficulty in reorganizing inventory
- 💡 Limited color options
- 🔀 Issues with syncing across devices

**Reported bugs**

- Inventory counts resetting to zero unexpectedly
- Inability to edit item names after creation
- Issues with importing large inventory lists

**Requested features**

- Add photo support for inventory items
- Ability to set minimum stock levels
- Option to sort and rearrange inventory lists
- Implement a reset function to reset all counts to zero
- Add push notifications for low stock items


## Frequently asked questions

### Is Oappso Stamp free?

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

### Is Portable Inventory free?

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

### Which has better reviews, Oappso Stamp or Portable Inventory?

Oappso Stamp is rated higher. Oappso Stamp averages 5.0 out of 5 from 2 ratings, while Portable Inventory averages 4.1 from 220 ratings.

### Do Oappso Stamp or Portable Inventory have ads?

Neither Oappso Stamp nor Portable Inventory shows ads.

### Which is updated more often, Oappso Stamp or Portable Inventory?

Oappso Stamp ships an update every 3 months, and Portable Inventory every 3 weeks. Most recently, Oappso Stamp was updated on September 8, 2026 and Portable Inventory on September 22, 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.*