Comparison

ContrastRx vs LnQ App

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

Head to head
About

ContrastRx

Provides quick access to treatment regimens for life-threatening reactions to radiographic contrast agents. Includes clinical descriptions, visual examples, and treatment protocols, along with helpful calculators and information on nephrogenic systemic fibrosis.

Highlights
  • Treatment regimens for contrast reactions
  • Clinical descriptions and pictorial examples
  • eGFR calculator
  • Pediatric dose calculator
  • Steroid pretreatment regimens
  • Nephrogenic systemic fibrosis overview
Features
Read full description

This app provides quick access to treatment regimens for potentially life-threatening reactions that can occur with iodine or gadolinium radiographic contrast. Included are clinical descriptions, pictorial examples, sound clips, and treatment regimens for the various types of reactions. Also included are a pediatric dose calculator, an eGFR calculator, a self-assessment module, pretreatment medication regimens, and an overview of nephrogenic systemic fibrosis.

About

LnQ App

Read full description

LnQ helps alleviate staffing problems with radiology by tapping into the hidden capacity that already exists. Whether used internally within a group, across a number of friendly groups, or as an open market solution, LnQ offers a more user friendly, cost effective, and less burdensome solution than most organization's current processes. We have created a network linking radiologists who have extra capacity to the larger medical market of radiology groups, hospitals and imaging centers wanting extra help. We have eliminated the middle man driving up price, adding complexity, and decreasing individual radiologist reimbursement. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

ContrastRx4 screens
LnQ App4 screens

Verdict

The call

ContrastRx and LnQ App 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

ContrastRx ships an update every 3 weeks, LnQ App every 2 weeks. The most recent releases landed on September 28, 2026 and September 30, 2026 respectively.

ScorecardNo meaningful differences
ContrastRx versus LnQ App: the parameters behind the verdict, then further details
ParameterContrastRxLnQ App
PriceFreeFree
Rating4.4 (9 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings9 — better—
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.615.1 — better
Further details — not scored
Size9 MB36 MB
Age rating17+4+
DeveloperMayo ClinicLnQ, Inc

In-app purchases

None

ContrastRx

No in-app purchases

None

LnQ App

No in-app purchases

Questions

Is ContrastRx free?
ContrastRx is free to download, with no in-app purchases.
Is LnQ App free?
LnQ App is free to download, with no in-app purchases.
Do ContrastRx or LnQ App have ads?
Neither ContrastRx nor LnQ App shows ads.
Which is updated more often, ContrastRx or LnQ App?
ContrastRx ships an update every 3 weeks, and LnQ App every 2 weeks. Most recently, ContrastRx was updated on September 28, 2026 and LnQ App on September 30, 2026.

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