# NPI SDK vs D2 Savings

The clearest difference is in-app purchases: NPI SDK at none against D2 Savings's 4. NPI SDK also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. D2 Savings sells 4 in-app purchases, starting at $149.99 per year. NPI SDK asks for nothing beyond the download.

NPI SDK ships an update every 9 months, D2 Savings every 8 months. The most recent releases landed on October 10, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | NPI SDK | D2 Savings |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/d2-savings/id6472498005/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 8 months** |
| Monetization | — | Free |
| Size | 20 MB | 23 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nippon Primex Inc.](https://appshunter.io/developer/792545796) | [Kayla Nangle](https://appshunter.io/developer/1717089812) |

## What reviewers say

### NPI SDK

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

**In-app purchases:** none


### D2 Savings

[App page](https://appshunter.io/ios/app/d2-savings/id6472498005)

Discover and support local businesses with exclusive deals and coupons. Learn about small businesses, connect with them on social media, and save money while shopping small. This app makes supporting local convenient and rewarding.

**Highlights:** Browse small business deals, Redeem coupons, Learn about small businesses, Follow social media, Save money

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual Unlimited | $149.99 | per year |
| Coupon - 3-7 Days | $4.99 | one-time |
| Coupon - 8-14 Days | $9.99 | one-time |
| Coupon - 15-30 Days | $14.99 | one-time |


## Frequently asked questions

### Is NPI SDK free?

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

### Is D2 Savings free?

D2 Savings is free to download, with in-app purchases available.

### Do NPI SDK or D2 Savings have ads?

Neither NPI SDK nor D2 Savings shows ads.

### Which is updated more often, NPI SDK or D2 Savings?

NPI SDK ships an update every 9 months, and D2 Savings every 8 months. Most recently, NPI SDK was updated on October 10, 2026 and D2 Savings on October 18, 2026.

---

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