# SPRINGviewer vs Lunio Smart+

The clearest difference is update cadence: Lunio Smart+ at every 3 days against SPRINGviewer's weekly. Lunio Smart+ also leads on iOS requirement (12.0 vs 26.0). 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.

SPRINGviewer ships an update weekly, Lunio Smart+ every 3 days. The most recent releases landed on September 12, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | SPRINGviewer | Lunio Smart+ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Size | 73 MB | 27 MB |
| Requires iOS | 26.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Torsten Seidel](https://appshunter.io/developer/1609083675) | [Qingdao Richmat Intelligence Technology Inc.](https://appshunter.io/developer/1814751082) |

## What reviewers say

### SPRINGviewer

[App page](https://appshunter.io/ios/app/springviewer/id1609123265)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lunio Smart+

[App page](https://appshunter.io/ios/app/lunio-smart-plus/id6741511316)

**In-app purchases:** none


## Frequently asked questions

### Is SPRINGviewer free?

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

### Is Lunio Smart+ free?

Lunio Smart+ is free to download, with no in-app purchases.

### Do SPRINGviewer or Lunio Smart+ have ads?

Neither SPRINGviewer nor Lunio Smart+ shows ads.

### Which is updated more often, SPRINGviewer or Lunio Smart+?

SPRINGviewer ships an update weekly, and Lunio Smart+ every 3 days. Most recently, SPRINGviewer was updated on September 12, 2026 and Lunio Smart+ on September 21, 2026.

---

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