Comparison

Oappso Stamp vs Portable Inventory

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Oappso Stamp

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
Read full description

The Oappso Stamp app! Get creating at the Oappso Loyalty website to get some cool looking loyalty cards to your customers. Use this app to update the loyalty cards with stamps and redeems. -Stay logged in for easy access. -Unlimited stamping. -Enable customer info. -Get the latest news direct to your phone about Oappso Loyalty.

About

Portable Inventory

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
Read full description

Portable Inventory helps you to keep track of the count of anything you want. Personal stuff, office supplies, product storage, etc. You can add different items into the app, set its initial count, warning count, and separate items by groups. Each item will be displayed as different colors on the main page, so that you can add or reduce the count. When an item’s count is equal or less than the warning count, a little yellow triangle with an excalmatory mark will be display on the item, and the group it belongs to. In addition, the app provided various functions to see statistics for your items or groups. You can check out the increasing, or decreasing ranking list of your items or groups in a specified time period. You can also see the change logs for all items and groups. The app works both on iPhone and iPad, and fully supports iCloud. You may edit your items across all your devices and your data will be safely stored in iCloud. And of course you can wipe out all data as you need.

Screenshots

Oappso Stamp3 screens
Portable Inventory4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Oappso Stamp versus Portable Inventory: the parameters behind the verdict, then further details
ParameterOappso StampPortable Inventory
PriceFreeFree
Rating5.0 (2 ratings) — better4.1 (220 ratings)
Positive reviews100.0% of reviews — better72.6% of reviews
Number of ratings2220 — better
Update frequencyEvery 3 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size19 MB4 MB
Age rating4+4+
DeveloperPhonebase LTDChengdu Wangqi03 Technology Ltd.

Customer experience

Oappso Stamp

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Portable Inventory

All ratings220 ratings
Positive77.7%
Neutral7.3%
Negative15.0%
Written reviews241 reviews
Positive72.6%
Neutral12.4%
Negative14.9%

Bugs and requests

Oappso Stamp

Not enough reviews yet to summarise bugs or requests.

Portable Inventory

Reported bugs

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

Requested features

6 requests
  • 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
Show 1 more
  • Improve sharing and collaboration features

In-app purchases

None

Oappso Stamp

No in-app purchases

3 purchases

Portable Inventory

One-time3
  • Complete Version$1.99
  • Pro Version$7.29
  • Pro Version$9.99

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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