# Solar Panel Calculator Plus vs TextVoice

The clearest difference is price: TextVoice at Free against Solar Panel Calculator Plus's $2.99. TextVoice also leads on update cadence (every 2 weeks vs every 47 months) and review sentiment (50% vs 25%). Solar Panel Calculator Plus's advantage is rating (3.3 vs 1.0) and in-app purchases (none vs 3). On ads and device support there is nothing between them.

TextVoice is free to download; Solar Panel Calculator Plus costs $2.99 up front. TextVoice sells 3 in-app purchases, starting at $4.99 per month. Solar Panel Calculator Plus asks for nothing beyond the download.

Solar Panel Calculator Plus holds the better App Store score, 3.3 against 1.0. That said, the two scores are not equally well evidenced: Solar Panel Calculator Plus has 23 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 25% of Solar Panel Calculator Plus's written reviews are positive against 50% of TextVoice's, so the app with the better star average is not the one people write more warmly about.

Solar Panel Calculator Plus ships an update every 47 months, TextVoice every 2 weeks. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Solar Panel Calculator Plus | TextVoice |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.3 (23 ratings)](https://appshunter.io/ios/app/solar-panel-calculator-plus/id1358184660/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/textvoice-text-to-speech/id6781257930/reviews) |
| Number of ratings | **23** | 1 |
| Positive reviews | 25.0% of reviews | **50.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 8 MB | 580 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [培 李](https://appshunter.io/developer/967575939) |

## What reviewers say

### 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


### TextVoice

[App page](https://appshunter.io/ios/app/textvoice-text-to-speech/id6781257930)

Convert text, PDFs, ebooks, and even photos into natural-sounding speech. Enjoy offline listening with privacy-focused on-device processing. Customize voices, speed, and export audio.

**Highlights:** Text to speech conversion, PDF, EPUB, TXT import, Web article reading, OCR from photos, Natural-sounding voices, Offline functionality, Audio export

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $4.99 | per month |
| Pro Yearly | $24.99 | per year |
| Pro Lifetime | $39.99 | one-time |


## Frequently asked questions

### Is Solar Panel Calculator Plus free?

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

### Is TextVoice free?

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

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

Solar Panel Calculator Plus is rated higher. Solar Panel Calculator Plus averages 3.3 out of 5 from 23 ratings, while TextVoice averages 1.0 from 1 ratings.

### Do Solar Panel Calculator Plus or TextVoice have ads?

Neither Solar Panel Calculator Plus nor TextVoice shows ads.

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

Solar Panel Calculator Plus ships an update every 47 months, and TextVoice every 2 weeks. Most recently, Solar Panel Calculator Plus was updated on October 29, 2026 and TextVoice on October 28, 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.*