# ShoppingCalculator byNSDev vs memomer

The clearest difference is in-app purchases: ShoppingCalculator byNSDev at none against memomer's 1. ShoppingCalculator byNSDev also leads on ads (none vs shown). memomer's advantage is update cadence (every 3 days vs every 39 months) and iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. memomer sells 1 one-off in-app purchase. ShoppingCalculator byNSDev asks for nothing beyond the download.

ShoppingCalculator byNSDev ships an update every 39 months, memomer every 3 days. The most recent releases landed on October 29, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ShoppingCalculator byNSDev | memomer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 39 months | **Every 3 days** |
| Size | 4 MB | 48 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NIHON SYSTEM DEVELOPER CORPORATION](https://appshunter.io/developer/1198103734) | [Bouzer LLC](https://appshunter.io/developer/1809286489) |

## What reviewers say

### ShoppingCalculator byNSDev

[App page](https://appshunter.io/ios/app/shoppingcalculator-bynsdev/id1279295619)

**Features:** macOS Compatibility

**In-app purchases:** none


### memomer

[App page](https://appshunter.io/ios/app/memomer-tree-notes-plus/id6774661729)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads & Unlock Limits | $5.99 | one-time |


## Frequently asked questions

### Is ShoppingCalculator byNSDev free?

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

### Is memomer free?

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

### Do ShoppingCalculator byNSDev or memomer have ads?

memomer shows ads; ShoppingCalculator byNSDev does not.

### Which is updated more often, ShoppingCalculator byNSDev or memomer?

ShoppingCalculator byNSDev ships an update every 39 months, and memomer every 3 days. Most recently, ShoppingCalculator byNSDev was updated on October 29, 2026 and memomer on October 31, 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.*