Comparison

xCluster vs SP2ALERT

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

Head to head
About

xCluster

Visualize DX cluster activity on a world map and in a list. Filter spots by call sign or band, and set custom alerts for specific stations or countries. Integrates with popular DX services and provides call parsing for location data.

Highlights
  • Display DX spots on map and list
  • Filter by band and call sign
  • Set custom alerts
  • Integrates with DXSummit and PSK Reporter
  • Built-in call parser
  • Zoom and pan map
Features
Read full description

xCluster is a visual display of dx cluster activity built for the iPad. DX spots are received via telnet or web services and displayed in a tabular form and plotted on a map of the world. You can filter the spots by call sign or band. Spots are created using the latitude and longitude of the dx station and spotter. The program has an internal call parsing component to determine the country for each call but can use QRZ.com for more accurate location data. Lookup priority is QRZ.com with the the call parser as a backup. DX spots can be displayed on a map or in a tabular form. Alerts for specific stations, bands or countries may be set and will be highlighted in the list and on the map. A number of major telnet clusters are built in along with DXSummit and PSK Reporter. PSK Reporter will display other stations that can hear your signal. You must be running WSJT-X or FLDIGI and have it configured correctly to work. You may contact the author with questions, suggestions or issues at support@w6op.com Features: Display dx spots on a map and in a list Predefined cluster servers and websites Filter by band and call sign Set alerts for display in the list and on the map Alerts can be set by country, band and call sign Save alerts in iCloud Built in call parser if QRZ.com is unavailable Freeform cluster command input Zoom and pan the map display

About

SP2ALERT

Features
Read full description

SP2ALERT is an alert app for amateur radio operators that delivers real-time push notifications for new POTA (Parks on the Air) and SOTA (Summits on the Air) spots. ■ POTA / SOTA Spot Alerts Automatically detects new spots and sends push notifications — even when the app is in the background. ■ Three Alert Modes (foreground only) • CW Vibration — vibrates in Morse code pattern (adjustable WPM and amplitude) • CW Tone — plays Morse code through the speaker (300–1500 Hz pitch) • Voice — reads spot information aloud (phonetic alphabet supported) ■ Flexible Filtering • Filter by band and mode (all bands from 160m to 13cm supported) • Filter by POTA program (JP, K, VK, etc.) or SOTA association • Include/exclude specific callsigns, park references, or summit references • Save and switch between multiple named presets ■ Hunt / Chase Management • Import POTA Hunt and SOTA Chase history via CSV • Alert only for unworked parks and summits • Multi-location activations (same operator at multiple parks) are always alerted even if one park is already hunted ■ Notification Controls • Configurable polling interval • Alert time window (e.g. 7:00–22:59 only) • Re-alert interval • Alert expiry timer • Additional alert on frequency/mode change ■ English / Japanese Localization The UI automatically switches between English and Japanese based on your device language setting. 【iOS Limitations】 Background operation is limited to notification banners and sounds. CW tone, voice, and vibration alerts only work while the app is in the foreground. Background polling timing is controlled by iOS and may be delayed beyond the configured interval.

Screenshots

SP2ALERT4 screens

Verdict

The call

The clearest difference is update cadence: SP2ALERT at every 2 days against xCluster's monthly. SP2ALERT also leads on iOS requirement (16.0 vs 26.0). 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

xCluster ships an update monthly, SP2ALERT every 2 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
xCluster versus SP2ALERT: the parameters behind the verdict, then further details
ParameterxClusterSP2ALERT
PriceFreeFree
Rating4.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyMonthlyEvery 2 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPadiPhone, iPad — better
Requires iOS26.016.0 — better
Further details — not scored
Size33 MB6 MB
Age rating4+4+
DeveloperPeter BourgetJIRO UENO

In-app purchases

None

xCluster

No in-app purchases

None

SP2ALERT

No in-app purchases

Questions

Is xCluster free?
xCluster is free to download, with no in-app purchases.
Is SP2ALERT free?
SP2ALERT is free to download, with no in-app purchases.
Do xCluster or SP2ALERT have ads?
Neither xCluster nor SP2ALERT shows ads.
Which is updated more often, xCluster or SP2ALERT?
xCluster ships an update monthly, and SP2ALERT every 2 days. Most recently, xCluster was updated on October 30, 2026 and SP2ALERT on October 31, 2026.

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