Comparison

SimpleCalc. vs OPTIMISER POWER

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

Head to head

SimpleCalc.

Just a simple calculator.

About

SimpleCalc.

Features

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Just a simple calculator. Use this calculator as your every day simple calculator with no ads, while having one of our beautiful tailor-made themes. Enjoy using it, and please put a nice review if you like it. Thanks! @Himnerom

About

OPTIMISER POWER

Features

Read full description

OPTIMISER POWER, Photon Solar's Data Cloud Center, is used to display the generating data of every solar module, summarize the power and energy yield, and manage the entire solar system. Functions: 1. Dynamically display the status of entire PV power station and every module in real time 2. Promptly locate the system failure and inform user by email or short message 3. Remotely deactivate the optimizers for maintenance or emergency purposes 4. Multi terminal login: PC, PAD and smart phone 5. Historical data query, big data analysis and automatical chart report

Screenshots

SimpleCalc.4 screens

OPTIMISER POWER4 screens

Verdict

The call

The clearest difference is update cadence: OPTIMISER POWER at fortnightly against SimpleCalc.'s every 7 months. OPTIMISER POWER also leads on iOS requirement (13.0 vs 15.0). 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.

UpkeepUpdate frequency

SimpleCalc. ships an update every 7 months, OPTIMISER POWER fortnightly. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 4 level

SimpleCalc. versus OPTIMISER POWER: the parameters behind the verdict, then further details
Parameter	SimpleCalc.	OPTIMISER POWER
Price	Free	Free
Update frequency	Every 7 months	Fortnightly — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPad, iPod, Mac — better	iPhone, iPad, iPod
Requires iOS	15.0	13.0 — better
Further details — not scored
Size	16 MB	39 MB
Age rating	4+	17+
Developer	Romain Rousseau	Khalid BEY

In-app purchases

None

SimpleCalc.

No in-app purchases

None

OPTIMISER POWER

No in-app purchases

Questions

Is SimpleCalc. free?

SimpleCalc. is free to download, with no in-app purchases.

Is OPTIMISER POWER free?

OPTIMISER POWER is free to download, with no in-app purchases.

Do SimpleCalc. or OPTIMISER POWER have ads?

Neither SimpleCalc. nor OPTIMISER POWER shows ads.

Which is updated more often, SimpleCalc. or OPTIMISER POWER?

SimpleCalc. ships an update every 7 months, and OPTIMISER POWER fortnightly. Most recently, SimpleCalc. was updated on October 2, 2026 and OPTIMISER POWER on October 3, 2026.