Comparison

yACK FAST vs Eola Power

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

Head to head
About

yACK FAST

Features
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Tool for using BlueSnap M6A wireless module, Scanfob® Brand RFID-NFC reader/writers, Scanfob® Brand BLE barcode scanners -View, and setup module parameters -Chat in STEAM mode with UART connected devices. -Show data like sensor readings, barcode/NFC/UHF scans. -Send scanner commands -Get RSSI readings from nearby BLE devices -Bluetooth Smart terminal function -Easy command history Serialio.com provides BLE app development libraries used in this app

About

Eola Power

Features
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Our app offers a seamless solution for connecting modern technology with legacy RS232 interfaces. Acting as a Bluetooth-to-RS232 proxy, it eliminates the need for outdated computers with physical DB9 or DB25 ports. As modern computers and mobile devices no longer come with RS232 ports, our ecosystem bridges the gap, enabling RS232 communication wirelessly through Bluetooth. This means no bulkier USB-to-RS232 adapters or older laptops, providing users with a compact, efficient way to connect, monitor, and manage RS232 devices directly from their phones or newer computers. Whether you're working with industrial machinery, specialized hardware, or legacy systems, our app ensures compatibility with modern devices, allowing you to continue using RS232 equipment without sacrificing convenience. By expanding compatibility to mobile devices, this solution also opens up new possibilities for interacting with legacy equipment in ways that weren't previously possible, making RS232 communication easier and more accessible.

Screenshots

yACK FAST4 screens
Eola Power3 screens

Verdict

The call

yACK FAST and Eola Power are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

yACK FAST ships an update every 2 months, Eola Power every 3 months. The most recent releases landed on October 10, 2026 and September 23, 2026 respectively.

ScorecardNo meaningful differences
yACK FAST versus Eola Power: the parameters behind the verdict, then further details
ParameteryACK FASTEola Power
PriceFreeFree
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better16.0
Further details — not scored
Size9 MB55 MB
Age rating4+17+
DeveloperSerialio Ltd.EOLA POWER LLC

In-app purchases

None

yACK FAST

No in-app purchases

None

Eola Power

No in-app purchases

Questions

Is yACK FAST free?
yACK FAST is free to download, with no in-app purchases.
Is Eola Power free?
Eola Power is free to download, with no in-app purchases.
Do yACK FAST or Eola Power have ads?
Neither yACK FAST nor Eola Power shows ads.
Which is updated more often, yACK FAST or Eola Power?
yACK FAST ships an update every 2 months, and Eola Power every 3 months. Most recently, yACK FAST was updated on October 10, 2026 and Eola Power on September 23, 2026.

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