# Sampling Calculator Lite vs Solar Panel Calculator Plus

The clearest difference is price: Sampling Calculator Lite at Free against Solar Panel Calculator Plus's $2.99. Sampling Calculator Lite also leads on update cadence (every 14 months vs every 47 months) and review sentiment (33% vs 25%). Solar Panel Calculator Plus's advantage is rating (3.3 vs 3.0) and ratings volume (23 vs 3). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Sampling Calculator Lite is free to download; Solar Panel Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Solar Panel Calculator Plus holds the better App Store score, 3.3 against 3.0. That said, the two scores are not equally well evidenced: Solar Panel Calculator Plus has 23 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 33% of Sampling Calculator Lite's written reviews are positive against 25% of Solar Panel Calculator Plus's, so the app with the better star average is not the one people write more warmly about.

Sampling Calculator Lite ships an update every 14 months, Solar Panel Calculator Plus every 47 months. The most recent releases landed on August 19, 2026 and August 22, 2026 respectively.

## The numbers

| Metric | Sampling Calculator Lite | Solar Panel Calculator Plus |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [3.0 (3 ratings)](https://appshunter.io/ios/app/sampling-calculator-lite/id1312060456/reviews) | **[3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews)** |
| Number of ratings | 3 | **23** |
| Positive reviews | **33.3% of reviews** | 25.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 14 months** | Every 47 months |
| Monetization | **Free** | Paid |
| Size | 1 MB | 8 MB |
| Requires iOS | 13.1 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Juan Manuel Alfredo Sanchez](https://appshunter.io/developer/1304811061) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Sampling Calculator Lite

[App page](https://appshunter.io/ios/app/sampling-calculator-lite/id1312060456)

This tool helps calculate sampling plans based on ANSI/ASQ Z1.4 2013 and MIL-STD-105E standards. It assists in determining sampling size codes and inspection levels for quality control processes.

**Highlights:** ANSI/ASQ Z1.4 2013 compliance, MIL-STD-105E compliance, Single sampling size calculation, Normal and Reduced inspection, AQL range from 0.065 to 15, Supports size code letters I, II, and III

**Features:** macOS Compatibility

**In-app purchases:** none


### Solar Panel Calculator Plus

[App page](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660)

Calculate custom off-grid solar home power systems. Determine the exact number of solar panels and battery capacity needed for your energy usage. Helps plan system size, inverter requirements, and battery bank specifications.

**Highlights:** Calculate solar panel requirements, Determine battery capacity, Calculate inverter size, Estimate daily energy usage, Plan days of autonomy, Optimize battery life calculations

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

**In-app purchases:** none


## Frequently asked questions

### Is Sampling Calculator Lite free?

Sampling Calculator Lite is free to download, with no in-app purchases.

### Is Solar Panel Calculator Plus free?

Solar Panel Calculator Plus costs $2.99, with no in-app purchases.

### Which has better reviews, Sampling Calculator Lite or Solar Panel Calculator Plus?

Solar Panel Calculator Plus is rated higher. Sampling Calculator Lite averages 3.0 out of 5 from 3 ratings, while Solar Panel Calculator Plus averages 3.3 from 23 ratings.

### Do Sampling Calculator Lite or Solar Panel Calculator Plus have ads?

Neither Sampling Calculator Lite nor Solar Panel Calculator Plus shows ads.

### Which is updated more often, Sampling Calculator Lite or Solar Panel Calculator Plus?

Sampling Calculator Lite ships an update every 14 months, and Solar Panel Calculator Plus every 47 months. Most recently, Sampling Calculator Lite was updated on August 19, 2026 and Solar Panel Calculator Plus on August 22, 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.*