Comparison

Fsolar vs Mail Decoder

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Real-time monitoring
  • Power station management
  • Equipment management
  • Remote control
  • Intelligent alarms
  • Information management
Features
Read full description

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.

About

Mail Decoder

Features
Read full description

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

Fsolar4 screens
Mail Decoder2 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference · 9 level
Fsolar versus Mail Decoder: the parameters behind the verdict, then further details
ParameterFsolarMail Decoder
PriceFreeFree
Rating3.7 (41 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings41 — better—
Update frequencyMonthly—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS15.4 — better17.0
Further details — not scored
Size83 MB1 MB
Age rating4+4+
DeveloperGuangzhou Felicity Solar Technology Co., Ltd.Zach Rottmann

In-app purchases

None

Fsolar

No in-app purchases

None

Mail Decoder

No in-app purchases

Questions

Is Fsolar free?
Fsolar is free to download, with no in-app purchases.
Is Mail Decoder free?
Mail Decoder is free to download, with no in-app purchases.
Do Fsolar or Mail Decoder have ads?
Neither Fsolar nor Mail Decoder shows ads.

Other comparisons