Fsolar vs Mail Decoder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fsolar
This platform offers intelligent cloud-based monitoring for photovoltaic data. It enables real-time tracking, power station and equipment management, remote control, and intelligent alarms for efficient information management of solar energy systems.
- Real-time monitoring
- Power station management
- Equipment management
- Remote control
- Intelligent alarms
- Information management
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Fsolar is an intelligent cloud platform with the main purpose of monitoring photovoltaic data . It provides users with real-time monitoring, power station management, equipment management, remote control, intelligent alarm and other functions, so that users can realize the information management of photovoltaic power stations.
Mail Decoder
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Official mail can be confusing and stressful — IRS letters, immigration notices, benefits paperwork, medical bills, legal forms. Mail Decoder turns intimidating mail into a clear, plain-language explanation, completely on your phone. Just point your camera at the letter. Mail Decoder reads it and tells you, in plain language: • What the letter actually means • The exact action you need to take • Any deadline you need to meet • Any amount of money involved 100% PRIVATE — NOTHING LEAVES YOUR PHONE The photo, the text recognition (OCR), and the AI that explains it all run entirely on your device using Apple Intelligence. Your letter, its contents, and the explanation are never uploaded, stored on a server, or shared with anyone. Mail Decoder works fully offline and needs no account. BUILT FOR REAL LIFE • Great for limited-English households — understand mail in clearer language • Help an aging parent or relative make sense of official letters • Never miss a deadline or a payment hidden in dense paperwork • No subscription, no sign-up, no tracking HOW IT WORKS 1. Open Mail Decoder and point the camera at the letter 2. It reads the text on-device and explains it in plain language 3. See the action, deadline, and money at a glance 4. Ask a follow-up question if anything is still unclear IMPORTANT Mail Decoder provides general, informational explanations to help you understand your mail. It is not legal, tax, immigration, financial, or medical advice, and it is not a substitute for a professional. Always verify important details and consult a qualified professional for decisions that matter.
Screenshots
Verdict
The clearest difference is iOS requirement: Fsolar at 15.4 against Mail Decoder's 17.0. On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Fsolar | Mail Decoder |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (41 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Monthly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 83 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Guangzhou Felicity Solar Technology Co., Ltd. | Zach Rottmann |
In-app purchases
Fsolar
No in-app purchases
Mail Decoder
No in-app purchases









