# NPI SDK vs RupayBill

The clearest difference is in-app purchases: NPI SDK at none against RupayBill's 2. RupayBill's advantage is update cadence (weekly vs every 9 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. RupayBill sells 2 in-app purchases, starting at $4.99 per month. NPI SDK asks for nothing beyond the download.

NPI SDK ships an update every 9 months, RupayBill weekly. The most recent releases landed on October 10, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | NPI SDK | RupayBill |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Size | 20 MB | 41 MB |
| Requires iOS | **13.0** | 14 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nippon Primex Inc.](https://appshunter.io/developer/792545796) | [SMCLOUDMYLE LLP](https://appshunter.io/developer/1792717679) |

## What reviewers say

### NPI SDK

[App page](https://appshunter.io/ios/app/npi-sdk/id792545793)

**In-app purchases:** none


### RupayBill

[App page](https://appshunter.io/ios/app/rupaybill/id6745431549)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RupayBill Monthly Premium | $4.99 | per month |
| RupayBill Premium Yearly | $49.99 | per year |


## Frequently asked questions

### Is NPI SDK free?

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

### Is RupayBill free?

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

### Do NPI SDK or RupayBill have ads?

Neither NPI SDK nor RupayBill shows ads.

### Which is updated more often, NPI SDK or RupayBill?

NPI SDK ships an update every 9 months, and RupayBill weekly. Most recently, NPI SDK was updated on October 10, 2026 and RupayBill 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.*