Comparison

My Solar vs Fast Post

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

Head to head
About

My Solar

Access real-time statistics for your home solar installation, including power generation, battery, and grid usage. View data via widgets, notifications, and Siri. Control charge/discharge settings and sync inverter time.

Highlights
  • Real-time solar generation stats
  • Home and lock screen widgets
  • Apple Watch complications
  • Siri integration
  • Battery and grid usage monitoring
  • Inverter charge/discharge control
  • Inverter clock synchronization
Features
Read full description

My Solar provides quick and easy access to up-to-date statistics for your home solar installation on iPhone and Apple Watch. Todays latest statistics are available direct in the app, via home and lock screen widgets, through notifications and also with Siri. My Solar currently supports installations with Solis inverters. Data is retrieved via the Solis Cloud API (freely available from Solis on request) or by using the open-source Solis Cloud Scraper project. Details for both are available in the app. Future versions will support different manufacturers inverters. The My Solar app presents current power generation statistics, showing you details for solar yield, electricity consumption and both battery and grid usage. In addition it also presents the same statistics for the day so-far. My Solar gives you at-a-glance access to your data by exposing information through widgets that can be directly installed on your iPhone home and lock screens or complications to use on your Apple Watch face. A variety of widgets are available to show individual or combined statistics, including current solar yield, current battery charge, electricity distribution, inverter temperature and a daily summary. Widgets refresh automatically to show the latest data. My Solar can also give you both a current and daily summary via Siri on all devices. Just ask "Hey Siri, display current stats from My Solar" for the current data or "Hey Siri, display todays stats from My Solar" for a summary of today so far. My Solar can notify you when your home battery discharges to a certain percentage, e.g when it reaches its minimum discharge level. It can also notify you when your home battery reaches a certain charge, e.g when you're approaching a full battery. You're also able to set an inverter temperature threshold to be notified about. With My Solar you can control the charge and discharge settings of your inverter. This is ideal if you have a cheaper overnight tariff and want to charge your batteries ready for the next day, or discharge batteries via a feed-in tariff. It's accessible right from the front screen and is simple and easy to use. You'll need to contact Solis for access to the appropriate API, but that is very straightforward and details are included in the app. My Solar will verify you have the correct API access before it allows you to purchase this upgrade, so you can have confidence your setup is correct. My Solar can even remind you to update these settings on a daily basis. My Solar will also synchronise your inverter timer with your iPhone. No more fiddly setting via the inverter, simply tap the button in My Solar and your inverter clock will be synchronised with your iPhone. You can also schedule a weekly background sync, so you never have to check again. The My Solar app presents clear current and daily statistics on both iPhone and Apple Watch. The iPhone app is where you configure your Solis Cloud API or Solis Cloud Scraper login details.

About

Fast Post

Features
Read full description

Discover post offices across the world at your fingertips with Fast Post, the ideal companion for all your postal needs. Your Personal Postal Guide: Fast Post effortlessly connects you to post offices near you, anywhere, anytime. Whether you're sending letters, purchasing stamps, or needing postal services on your travels, Fast Post ensures you're never more than a few taps away from your nearest post office. Real-Time Mapping: No more guessing or hunting for the nearest post office. Our intelligent GPS tracking quickly identifies your location and populates your surroundings with nearby post offices on a user-friendly map. Features: - Real-Time Locator: Pinpoints your current location and shows nearby post offices in an instant. - Interactive Map: A user-friendly map interface that guides you directly to your desired post office. Join thousands of users who are making their postal needs a breeze with Fast Post. Simplify your life with a tool that is intuitive, efficient, and always ready to guide you to your nearest post office.

Screenshots

My Solar4 screens
Fast Post4 screens

Verdict

The call

The clearest difference is price: Fast Post at Free against My Solar's $2.99. Fast Post also leads on in-app purchases (none vs 1) and iOS requirement (13.0 vs 16.0). My Solar's advantage is ads (none vs shown). On update cadence and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Fast Post is free to download; My Solar costs $2.99 up front. My Solar sells 1 one-off in-app purchase. Fast Post asks for nothing beyond the download.

UpkeepUpdate frequency

My Solar ships an update every 6 weeks, Fast Post every 2 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

Scorecard4 real differences ยท 4 level
My Solar versus Fast Post: the parameters behind the verdict, then further details
ParameterMy SolarFast Post
Price$2.99Free โ€” better
Positive reviews87.5% of reviewsโ€”
Update frequencyEvery 6 weeks โ€” betterEvery 2 months
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
MonetizationFree with in-app purchasesโ€”
DevicesiPhone, Apple WatchiPhone, iPod
Requires iOS16.013.0 โ€” better
Further details โ€” not scored
Size10 MB20 MB
Age rating4+4+
DeveloperRichard LevyCraig Robertson

In-app purchases

1 purchases

My Solar

One-time1
  • Inverter Charge/Discharge$2.99
None

Fast Post

No in-app purchases

Questions

Is My Solar free?
My Solar costs $2.99, and also offers in-app purchases.
Is Fast Post free?
Fast Post is free to download, with no in-app purchases.
Do My Solar or Fast Post have ads?
Fast Post shows ads; My Solar does not.
Which is updated more often, My Solar or Fast Post?
My Solar ships an update every 6 weeks, and Fast Post every 2 months. Most recently, My Solar was updated on November 3, 2026 and Fast Post on October 27, 2026.

Other comparisons