# INVT Pump vs 小库存升级版

The clearest difference is in-app purchases: INVT Pump at none against 小库存升级版's 3. INVT Pump also leads on iOS requirement (9.0 vs 16.6). 小库存升级版's advantage is update cadence (weekly vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. 小库存升级版 sells 3 one-off in-app purchases. INVT Pump asks for nothing beyond the download.

INVT Pump ships an update every 4 months, 小库存升级版 weekly. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | INVT Pump | 小库存升级版 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Size | 46 MB | 27 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [深圳市英威腾电气股份有限公司](https://appshunter.io/developer/1012943436) | [忠和 朱](https://appshunter.io/developer/693145014) |

## What reviewers say

### INVT Pump

[App page](https://appshunter.io/ios/app/invt-pump/id1148890283)

**Features:** macOS Compatibility

**In-app purchases:** none


### 小库存升级版

[App page](https://appshunter.io/ios/app/id1425757719)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度费用 | $1.99 | one-time |
| 年度费用 | $13.99 | one-time |
| 年度费用 | $19.99 | one-time |


## Frequently asked questions

### Is INVT Pump free?

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

### Is 小库存升级版 free?

小库存升级版 is free to download, with in-app purchases available.

### Do INVT Pump or 小库存升级版 have ads?

Neither INVT Pump nor 小库存升级版 shows ads.

### Which is updated more often, INVT Pump or 小库存升级版?

INVT Pump ships an update every 4 months, and 小库存升级版 weekly. Most recently, INVT Pump was updated on September 30, 2026 and 小库存升级版 on October 1, 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.*