Comparison

Solar power 2.0 vs E

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

Head to head
About

Solar power 2.0

This app allows Bluetooth remote control for solar charge controllers. Monitor solar power generation data in real-time and set charging parameters for different battery types. It does not collect user data and is free to use with no ads.

Highlights
  • Bluetooth remote control
  • Real-time solar data monitoring
  • Customizable charging parameters
  • Battery type settings
  • Operation mode selection
  • No user data collection
Features
Read full description

这个应用是一个蓝牙远程操作软件,为太阳能充电控制器开发。用户可以实时监测与太阳能发电有关的数据,便于用户为不同类型的电池设定充电参数和操作模式。它不收集用户的本地数据。只能用蓝牙连接。没有必要注册帐户,也没有广告(免费使用)

About

E

Read full description

E-Write NFC is a configuration tool used for the purpose of configuring NFC-enabled Axiomatic controllers; valve drivers, signal converters, and others. E-Write NFC tool is a means of allowing users to configure NFC-enabled Axiomatic controllers to suit their application. Parameters such as Input Type, Output Type, Output Min/Max Range can all be adjusted using the E-Write NFC. View more at Axiomatic.com

Screenshots

Solar power 2.04 screens
E4 screens

Verdict

The call

The clearest difference is price: Solar power 2.0 at Free against E's $49.99. On update cadence, 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

Solar power 2.0 is free to download; E costs $49.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Solar power 2.0 ships an update every 7 months, E every 11 months. The most recent releases landed on July 5, 2026 and August 28, 2026 respectively.

Scorecard1 real difference · 7 level
Solar power 2.0 versus E: the parameters behind the verdict, then further details
ParameterSolar power 2.0E
PriceFree — better$49.99
Positive reviews50.0% of reviews—
Update frequencyEvery 7 months — betterEvery 11 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.0 — better15.6
Further details — not scored
Size48 MB26 MB
Age rating4+4+
Developer凌 郭Axiomatic Technologies Corporation

In-app purchases

None

Solar power 2.0

No in-app purchases

None

E

No in-app purchases

Questions

Is Solar power 2.0 free?
Solar power 2.0 is free to download, with no in-app purchases.
Is E free?
E costs $49.99, with no in-app purchases.
Do Solar power 2.0 or E have ads?
Neither Solar power 2.0 nor E shows ads.
Which is updated more often, Solar power 2.0 or E?
Solar power 2.0 ships an update every 7 months, and E every 11 months. Most recently, Solar power 2.0 was updated on July 5, 2026 and E on August 28, 2026.

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