Comparison

On vs RDAP Pro

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

Head to head
About

On

This tool assists amateur radio operators with managing on-air nets and check-ins. It offers real-time messaging, email integration, and detailed operator information retrieval. The app supports multiple simultaneous sessions and configurable displays for efficient communication and tracking.

Highlights
  • Real-time net check-in tracking
  • Instant messaging (AIM) sessions
  • Integrated email client
  • Configurable information displays
  • QRZ/QRZCQ call sign lookup
  • WebSDR audio streaming
  • QRZ Logbook integration
Read full description

On-Air Net Scraper "Personal" Pro is an iPhone/iPad/MacOS silicon App providing a wide range of features for Amateur Radio operators (Hams). Key features include NetLogger Amateur Radio On-Air Nets, Check-Ins and multiple Almost Instant Message (AIM) sessions in real-time data awareness. AIM pass key automatic email request with single button click resulting in immediate pass key information reply. Full integrated Email client for yet another method for Hams to carry out conversations. Multiple tabbed displays allowing user to track unlimited number of On-Air Net Check-Ins at one time. User configurable information displays to included viewing detailed Ham information within Check-In views. Near real-time AIM client text message send and receive. Searching and viewing Past NetLogger Nets and Check-Ins. Monitor mode so users can be aware of NetLogger Check-In "lurkers". Simultaneous QRZ and QRZCQ login is supported facilitating Call Sign lookup and Ham information retrieval. Easy, click to display NetLogger Nets, Check-Ins Call Sign and operator status information, not requiring QRZ/CQ accounts. Multi-screen displays to included improved 2-way and 3-way split screens provide simultaneous displays of Check-Ins, AIM, AIM and Net Scraper Message Exchange current listing data along with WebSDR viewing and listening. PERSISTENT WebSDR radio LIVE audio listenings while simultaneously viewing multiple Net Check-In views. Seamlessly integrates with On-Air Net Scraper Desktop Server WebSocket Interface supporting private Internet chat sessions between On-Air Net Scraper ME clients. JS8Call/WSJTX full participation in digital radio REAL-TIME texting when using NetBird VPN or when paired with On-Air Net Scraper's Message Exchange (ME) Server. Autoload favorite NetLogger nets. Callsign search both NetLogger Active and Past net listing, including improved automatic continuous search and displaying of matched nets. QRZ Logbook insert/update/delete. Supports On-Device authentication and Two-Factor authentication in addition to encrypted secure storage of sensitive data and app access security. JS8Call dynamic frequency adjustment.

About

RDAP Pro

This app enables emergency response teams to communicate and coordinate effectively when traditional networks fail. It facilitates structural assessment, resource tracking, and casualty management, working entirely off-grid using mesh networking technology.

Highlights
  • Off-grid communication
  • Structural assessment and reporting
  • First responder coordination
  • Casualty and status tracking
  • Multi-jurisdictional management
  • Mesh networking technology
Features
Read full description

Field reporting for disaster response. RDAP puts damage assessment and situation reporting in the hands of everyone working an incident. Reports from the field flow into the RDAP EOC platform, where coordinators build the operational picture that drives resource decisions. REPORT FROM THE FIELD Submit structured reports without paper forms or radio relay. What you observe on scene reaches coordinators as soon as you hit submit, with no transcription step in between. WORKS WITHOUT SIGNAL Coverage in a disaster area is unpredictable. Create reports, attach photos, and log assessments with no connection at all. RDAP holds everything on the device and uploads automatically the moment service returns, so nothing is lost in a dead zone and no one has to reconstruct what they saw hours later. STRUCTURAL AND INFRASTRUCTURE ASSESSMENT Document the condition of buildings, roads, bridges, and critical infrastructure. Attach photos and location data so coordinators can prioritize resource deployment and evacuation decisions on current information. RESOURCE AND RESPONDER STATUS Update the position and status of response units and teams from the field, keeping the EOC's operational picture accurate as conditions change. POPULATION AND CASUALTY STATUS Record population status and casualty information by location so coordinators can identify which areas need medical response first. ONE PICTURE ACROSS JURISDICTIONS Reports from state, county, and city teams land in a shared operational picture, so agencies working the same incident work from the same information. FOR RESPONDERS AND VOLUNTEERS State, county, and municipal emergency management agencies EMS, fire, and law enforcement Emergency operations center staff Damage assessment and CERT teams Volunteers joining relief efforts RDAP is a reporting tool and does not replace 911 or official dispatch systems. In a life-threatening emergency, call 911. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

On4 screens
RDAP Pro3 screens

Verdict

The call

The clearest difference is review sentiment: On at 50% against RDAP Pro's 0%. On also leads on rating (4.4 vs 2.8) and in-app purchases (none vs 6). On price, update cadence, ads 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. RDAP Pro sells 6 in-app purchases, starting at $9.99 per month. On asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On holds the better App Store score, 4.4 against 2.8. Both are backed by a comparable volume of ratings — 13 and 4 respectively. Written reviews point the same way: 50% of On's written reviews are positive against 0% of RDAP Pro's.

UpkeepUpdate frequency

On ships an update monthly, RDAP Pro every 3 weeks. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard5 real differences · 5 level
On versus RDAP Pro: the parameters behind the verdict, then further details
ParameterOnRDAP Pro
PriceFreeFree
Rating4.4 (13 ratings) — better2.8 (4 ratings)
Positive reviews50.0% of reviews — better0.0% of reviews
Number of ratings13 — better4
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.615.0 — better
Further details — not scored
Size30 MB44 MB
Age rating17+9+
DeveloperChristopher RobsonRDAP Pro

Customer experience

On

All ratings13 ratings
Positive84.6%
Neutral7.7%
Negative7.7%
Written reviews8 reviews
Positive50.0%
Neutral12.5%
Negative37.5%

RDAP Pro

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

On

No in-app purchases

6 purchases

RDAP Pro

Subscriptions6
  • Starter Monthly Subscription$9.991 Month
  • Monitor Monthly Subscription$19.991 Month
  • Community Monthly Subscription$29.991 Month
Show 3 more
  • Starter Annual Subscription$89.991 Year
  • Monitor Annual Subscription$189.991 Year
  • Community Annual Subscription$289.991 Year

Questions

Is On free?
On is free to download, with no in-app purchases.
Is RDAP Pro free?
RDAP Pro is free to download, with in-app purchases available.
Which has better reviews, On or RDAP Pro?
On is rated higher. On averages 4.4 out of 5 from 13 ratings, while RDAP Pro averages 2.8 from 4 ratings.
Do On or RDAP Pro have ads?
Neither On nor RDAP Pro shows ads.
Which is updated more often, On or RDAP Pro?
On ships an update monthly, and RDAP Pro every 3 weeks. Most recently, On was updated on October 24, 2026 and RDAP Pro on October 25, 2026.

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