CalcRx vs Catch the Sig
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CalcRx
This app helps medical professionals quickly calculate prescription dispense quantities and billable days supply. It handles various dosage forms and complex regimens, saving valuable time for pharmacists, nurses, and prescribers.
- Prescription quantity calculations
- Billable days supply determination
- Supports various dosage forms
- Handles complex regimens
- Standard calculator with history
- Sig code reference
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Calc Rx is an outpatient prescription calculator that makes determining dispense quantities and billable days supply fast and effortless. Simply tap in the sig (directions) and Calc Rx does the rest. Complex steroid tapers, warfarin regimens, ear/eye drops, liquids, and more are all a snap. Pharmacists, pharmacy techs, nurses, and prescribers will be amazed by the time saved by this useful little app! Features *5 calculators specific to common outpatient dosage forms and regimens (tablets/capsules, oral liquids, ear/eye drops, insulin, and warfarin) *fully equipped standard calculator with complete history display *automatic quantity calculations for 30 and 90 day supplies *unlimited undo for precision editing *future fill date calculator *sig code / medical abbreviation reference Check out my other apps RxOrange and OTC Assistant! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Catch the Sig
Practice identifying prescription abbreviations commonly found on medication directions. This game is designed for pharmacy and healthcare students to improve their recognition of these essential terms.
- Identify prescription abbreviations
- Practice for healthcare students
- Focus on prescription directions (sig)
- Learn common abbreviations
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This game is designed to provide pharmacy students and other health care professional students with practice identifying abbreviation which may be included in a prescription sig, i.e. directions. Not all the abbreviations included in this game might recommended but may still found on prescriptions presented to a pharmacist.
Screenshots
Verdict
The clearest difference is in-app purchases: Catch the Sig at none against CalcRx's 2. Catch the Sig also leads on rating (5.0 vs 4.7). CalcRx's advantage is ratings volume (15 vs 1) and iOS requirement (13.0 vs 18.6). 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
Both are free to download. CalcRx sells 2 in-app purchases, starting at $0.99 per month. Catch the Sig asks for nothing beyond the download.
Catch the Sig holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: CalcRx has 15 ratings behind it against 1, so its average is the more settled of the two.
Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.
| Parameter | CalcRx | Catch the Sig |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (15 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 15 — better | 1 |
| Update frequency | Every 10 months | Every 10 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 29 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | Dabbling Badger LLC | David Bourne |
Customer experience
CalcRx
Catch the Sig
In-app purchases
CalcRx
- Monthly Full Access$0.991 Month
- Yearly Full Access$9.991 Year
Catch the Sig
No in-app purchases
Questions
Is CalcRx free?
Is Catch the Sig free?
Which has better reviews, CalcRx or Catch the Sig?
Do CalcRx or Catch the Sig have ads?
Which is updated more often, CalcRx or Catch the Sig?
Other comparisons
