Solar Panel Calculator Plus vs TextVoice
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Solar Panel Calculator Plus
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.
- Calculate solar panel requirements
- Determine battery capacity
- Calculate inverter size
- Estimate daily energy usage
- Plan days of autonomy
- Optimize battery life calculations
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Solar Panel Calculator Plus calculate custom Off-Grid Solar Home Power Systems. Use these handy calculator to help decide which system size is right for you. You can calculate the Exact Number of Solar Panels You Need For Your Usage Plus the Space you need. Also include Battery Capacity for your Home Power Systems. Daily energy use: Find the energy used in a day. Figure out how long each electronic device will be run in hours during a day. Multiply the wattage of each device by its run-time to get the energy in watt-hours per day. Add up all the watt-hour values to get a total for your home. Example: Light bulbs run for 5 hours a day. Computer runs for 2 hours a day. 100 x 5 + 300 x 2 = 1100 watt-hours. Inverter size: To determine the inverter size we must find the peak load or maximum wattage of your home. This is found by adding up the wattage of the appliances and devices that could be run at the same time. Include everything from microwaves and lights to computers and clocks. The sum will tell you which inverter size you need. Example: A room has two 60 watt light bulb and a 300 watt desktop computer. The inverter size is 60 x 2 + 300 = 420 watts. Multiply with 1.2 or 1.5 into a safe area. Days of autonomy: Now decide how many days worth of energy you want to store in your battery bank. Generally this is anywhere from two to five. Battery bank capacity: Example: You want the battery bank to last three days without recharging and that you use 5.0 kwh per day. As 5.0 x 3 x 2 = 30.0kwh, this is the energy we need from the batteries. Converting this to AH we have to divide by the voltage of your system. This can be 12, 24 or 48 for commercial application. If we choose to use 48V, the minimum AH capacity is then 30 000/48 = 625 AH. Now if you divide by your battery's rating you find the number of batteries you must use. The larger the system you have, the higher the voltage you should have. It is normal to match a 12 V battery bank to a 400 W power system. A 5 kW system would work most appropriately with a 48 V wiring system, in order to decrease current flow in the wires. Note: All calculations assume only a 50% discharge to your batteries to optimize battery life. Note: Colder temperatures have a negative effect on the capacity of your battery bank. If your battery bank is always indoors in a heated area then you don't have a problem. But if they're stored in an unheated area during the winter then you'll need to account for this. Solar Panel: The most typical solar panel size used for residential installations is 65 inches by 39 inches. And the wattage output range from 200 - 330 watts. *Thanks for your support, stay tune for more update to come
TextVoice
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.
- Text to speech conversion
- PDF, EPUB, TXT import
- Web article reading
- OCR from photos
- Natural-sounding voices
- Offline functionality
- Audio export
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Listen to anything. TextVoice turns text, PDFs, ebooks, web pages, and even photos into natural, lifelike speech — right on your device, even offline. No accounts. No uploads. Your text never leaves your iPhone. WHY TEXTVOICE • Natural, expressive voices that sound human — not robotic • Works 100% offline. No network required, ever • Private by design: text is processed on-device and never uploaded • 32 languages with multiple male and female voices TURN ANYTHING INTO SPEECH • Type or paste any text and hear it instantly • Import PDF, Word, EPUB, and TXT documents • Read web articles — paste a link and listen to the story • Snap a photo or pick from your library, and TextVoice reads the text (OCR) • Continuous reading across long documents, chapter by chapter LISTEN YOUR WAY • Choose from a range of voices — warm, bright, calm, energetic, broadcast • Adjust speed and quality to your taste • Sleep timer: stop after a set time, the current segment, or the whole piece • Resume right where you left off • Export audio as M4A or WAV to keep or share SAVE & SYNC • Save anything you make to your History • Sync history across your devices with iCloud • Audio is regenerated on each device — only text and settings sync, never your files GREAT FOR • Turning long articles and PDFs into hands-free audio • Studying, proofreading, and catching typos by ear • Readers who prefer listening, including support for dyslexia • Commutes, workouts, chores, and resting your eyes TEXTVOICE PRO Upgrade to Pro for unlimited synthesis, continuous reading, and unlimited saved history. Available as a yearly or monthly subscription, or a one-time Lifetime purchase. • Payment is charged to your Apple ID at confirmation of purchase. • Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. • Manage or cancel anytime in your device Settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy and Terms of Use are also available in the app. RESPONSIBLE USE TextVoice creates AI-generated speech. Please use it responsibly: don't clone others' voices without consent, generate misinformation, or use it for unlawful purposes. Disclose AI-generated audio when sharing it publicly. Download TextVoice and turn everything you read into something you can listen to.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Solar Panel Calculator Plus | TextVoice |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 3.3 (23 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 25.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 23 — better | 1 |
| Update frequency | Every 47 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 8 MB | 580 MB |
| Age rating | 4+ | 4+ |
| Developer | Nitrio | 培 李 |
Customer experience
Solar Panel Calculator Plus
TextVoice
In-app purchases
Solar Panel Calculator Plus
No in-app purchases
TextVoice
- Pro Monthly$4.991 Month
- Pro Yearly$24.991 Year
- Pro Lifetime$39.99
Questions
Is Solar Panel Calculator Plus free?
Is TextVoice free?
Which has better reviews, Solar Panel Calculator Plus or TextVoice?
Do Solar Panel Calculator Plus or TextVoice have ads?
Which is updated more often, Solar Panel Calculator Plus or TextVoice?
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