# PV Go vs QFlash

The clearest difference is in-app purchases: PV Go at none against QFlash's 2. PV Go also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.6). QFlash's advantage is ads (none vs shown) and update cadence (every 9 days vs every 6 months). On price there is nothing between them.

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

PV Go ships an update every 6 months, QFlash every 9 days. The most recent releases landed on October 9, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | PV Go | QFlash |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | Ad-supported | — |
| Size | 44 MB | 17 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Thingnario co. LTD](https://appshunter.io/developer/1296191019) | [Pokai Lee](https://appshunter.io/developer/1826542407) |

## What reviewers say

### PV Go

[App page](https://appshunter.io/ios/app/pv-go/id1296191020)

This AI-powered system optimizes photovoltaic (PV) operations of any scale by intelligently managing data to prevent performance decline and latency. It predicts energy output with high accuracy and provides data-backed visualizations for efficient O&M ticket dispatch.

**Highlights:** AI-powered energy output prediction, Intelligent data management, O&M ticket dispatch system, Data-backed visualizations, Real-time GUI monitoring, Topology and heatmap views

**Features:** macOS Compatibility

**In-app purchases:** none


### QFlash

[App page](https://appshunter.io/ios/app/qflash-quick-flashcards/id6751162061)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $4.99 | per month |
| Premium | $34.99 | per year |


## Frequently asked questions

### Is PV Go free?

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

### Is QFlash free?

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

### Do PV Go or QFlash have ads?

PV Go shows ads; QFlash does not.

### Which is updated more often, PV Go or QFlash?

PV Go ships an update every 6 months, and QFlash every 9 days. Most recently, PV Go was updated on October 9, 2026 and QFlash on October 14, 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.*