Comparison

RST Scope vs OnDuty App

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

Head to head
About

RST Scope

This utility app provides spectrum scope and waterfall displays for amateur radio operators. It enhances radios lacking these features by analyzing microphone input, allowing for clear distinction of Morse code and detailed audio frequency visualization.

Highlights
  • Spectrum scope and waterfall display
  • Morse code distinction via FFT
  • Adjustable waterfall speed
  • Adjustable audio input level
  • Switchable display band (wide/narrow)
  • Display pause function
  • Recording and playback of input sound
Read full description

This is an app for amateur radio operators with a narrow band of audio frequency, spectrum scope & waterfall display. You can get a rich display by microphone inputting the speaker output of a radio that does not have a spectrum scope or waterfall function. The FFT allows you to distinguish between the dot and dash of Morse code. [function] 1. Ability to change the speed of the waterfall 2. Ability to adjust the level of audio input 3. Function to switch the display band between wide and narrow 4. Display pause function (pause / cancel by touching the screen) 5. Function to switch the cross hatch ON / OFF by longTap 6. Frequency resolution is fixed at 40Hz. 7. Function to switch the USB/LSB by Left/Right Swipe 8.Recording/Playback function of Input Sound RST Scope(Free) https://www.youtube.com/watch?v=1s9RvOFp52g

About

OnDuty App

This AI-powered field companion assists paramedics and EMTs with clinical decision support and shift management. It offers a streamlined alternative to traditional binders and PDFs, designed for high-stress emergency situations.

Highlights
  • AI-powered clinical decision support
  • Shift schedule management
  • Streamlined workflow
  • Pocket-sized tool
  • Designed by veteran paramedic
Features
Read full description

Your Partner on Every Call. The tones just dropped. You don't have time to dig through a torn 300-page binder or thumb through a clunky PDF while your patient needs you. OnDuty puts everything you need in your pocket — built by a working paramedic who's lived the job, not a tech company guessing at it. Built for the rig, not the boardroom: AI Clinical Assistant — Ask a question in plain language, get protocol-grounded answers in seconds, not scrolling. Jurisdiction-Specific Protocols — Your agency's actual protocols, verified and organized by category — not generic guidelines that don't match your scope. Real-Time Hospital Finder — Nearest receiving facilities with real capabilities — trauma, STEMI, stroke — so transport decisions are fast and confident. AI PCR Narrative Generator — Turn your call notes into a clean, complete narrative in a fraction of the time. Instant Dosage Calculator — Weight-based meds, done in seconds when seconds matter. Shift & Pay Tracker — Manage your grueling schedule and know exactly what you're earning. CME & Certification Tracker — Stop losing your card to a missed deadline. One app. Built by someone who's actually run the calls. Subscription Details: OnDuty is available with a 14-day free trial. After the trial, full access requires an auto-renewing subscription — $3.99/month or $29.99/year. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/theondutyapp.com/the-onduty-app/privacy-policy?authuser=0

Screenshots

RST Scope3 screens
OnDuty App4 screens

Verdict

The call

The clearest difference is in-app purchases: RST Scope at none against OnDuty App's 2. OnDuty App's advantage is ads (none vs shown). On price, rating, ratings volume and update cadence 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. OnDuty App sells 2 in-app purchases, starting at $2.99 per month. RST Scope asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for RST Scope against 5.0 for OnDuty App. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 6 level
RST Scope versus OnDuty App: the parameters behind the verdict, then further details
ParameterRST ScopeOnDuty App
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Number of ratings11
Update frequencyEvery 3 daysEvery 3 days
AdsYesNo — better
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.0 — better
Further details — not scored
Size5 MB20 MB
Age rating4+17+
Developerkoji kamogawaDan Jones

Customer experience

RST Scope

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

OnDuty App

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RST Scope

No in-app purchases

2 purchases

OnDuty App

Subscriptions2
  • Monthly subscription14 Days trial$2.991 Month
  • Yearly Subscription$29.991 Year

Questions

Is RST Scope free?
RST Scope is free to download, with no in-app purchases.
Is OnDuty App free?
OnDuty App is free to download, with in-app purchases available.
Which has better reviews, RST Scope or OnDuty App?
RST Scope and OnDuty App are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do RST Scope or OnDuty App have ads?
RST Scope shows ads; OnDuty App does not.
Which is updated more often, RST Scope or OnDuty App?
RST Scope ships an update every 3 days, and OnDuty App every 3 days. Most recently, RST Scope was updated on October 13, 2026 and OnDuty App on October 7, 2026.

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