# USCalculation vs ZEG MEMO

The clearest difference is update cadence: ZEG MEMO at fortnightly against USCalculation's every 2 months. USCalculation's advantage is iOS requirement (14.2 vs 17.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

USCalculation ships an update every 2 months, ZEG MEMO fortnightly. The most recent releases landed on October 4, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | USCalculation | ZEG MEMO |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 18 MB | 4 MB |
| Requires iOS | **14.2** | 17.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [tsuyoshi saito](https://appshunter.io/developer/1530882113) | [HIROYUKI HONDA](https://appshunter.io/developer/1761841238) |

## What reviewers say

### USCalculation

[App page](https://appshunter.io/ios/app/uscalculation/id1530891519)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZEG MEMO

[App page](https://appshunter.io/ios/app/zeg-memo/id6618156598)

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

**In-app purchases:** none


## Frequently asked questions

### Is USCalculation free?

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

### Is ZEG MEMO free?

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

### Do USCalculation or ZEG MEMO have ads?

Neither USCalculation nor ZEG MEMO shows ads.

### Which is updated more often, USCalculation or ZEG MEMO?

USCalculation ships an update every 2 months, and ZEG MEMO fortnightly. Most recently, USCalculation was updated on October 4, 2026 and ZEG MEMO on October 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*