# NBMS vs 易则易知

NBMS and 易则易知 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

NBMS ships an update every 2 months, 易则易知 every 5 weeks. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NBMS | 易则易知 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Size | 47 MB | 19 MB |
| Requires iOS | **10.0** | 11.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [尼讯(上海)科技有限公司](https://appshunter.io/developer/1314854400) | [上海易知信息科技股份有限公司](https://appshunter.io/developer/1439442031) |

## What reviewers say

### NBMS

[App page](https://appshunter.io/ios/app/nbms/id1314854401)

**Features:** macOS Compatibility

**In-app purchases:** none


### 易则易知

[App page](https://appshunter.io/ios/app/id1502945729)

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

**In-app purchases:** none


## Frequently asked questions

### Is NBMS free?

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

### Is 易则易知 free?

易则易知 is free to download, with no in-app purchases.

### Do NBMS or 易则易知 have ads?

Neither NBMS nor 易则易知 shows ads.

### Which is updated more often, NBMS or 易则易知?

NBMS ships an update every 2 months, and 易则易知 every 5 weeks. Most recently, NBMS was updated on October 7, 2026 and 易则易知 on September 27, 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.*