Nject vs SemaCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Nject
This app serves as a comprehensive resource for aesthetic professionals. It offers tools for dilution calculations, facilitates partnerships, and provides a live forum with experts. Users can also find assistance with vascular occlusion and access other valuable information.
- Dilution Calculators
- Partnership Facilitation
- Live Expert Forum
- Vascular Occlusion Help
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Nject is a one stop shop for all your Aesthetics needs like: Dilution Calculators, Partnerships, Live Forum with experts, Vascular Occlusion help, and more...
SemaCalc
This medical app simplifies semaglutide dilution calculations for healthcare professionals. It provides precise dilution guidance and recommends appropriate syringes for dosage preparation, enhancing accuracy and efficiency.
- Semaglutide dilution calculation
- Precise dilution guidance
- Syringe recommendations
- Dosage preparation
- Workflow streamlining
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Simplify your semaglutide dilution process with our intuitive app. Calculate precise dilutions effortlessly and receive recommendations for the appropriate syringe to use. Perfect for healthcare professionals, our app ensures accuracy and efficiency in your dosage preparations, all in one convenient platform. Download now and streamline your workflow!
Screenshots
Verdict
The clearest difference is ratings volume: Nject at 126 against SemaCalc's 6. Nject also leads on update cadence (every 6 weeks vs every 4 months) and chart position (#11 vs #195). SemaCalc's advantage is review sentiment (71% vs 57%) and price ($3.99 vs $4.99). On rating, 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
Nject costs $4.99 and SemaCalc $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SemaCalc holds the better App Store score, 4.2 against 4.0. That said, the two scores are not equally well evidenced: Nject has 126 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 57% of Nject's written reviews are positive against 71% of SemaCalc's.
Nject ships an update every 6 weeks, SemaCalc every 4 months. The most recent releases landed on September 29, 2026 and August 27, 2026 respectively.
| Parameter | Nject | SemaCalc |
|---|---|---|
| Price | $4.99 | $3.99 — better |
| Rating | 4.0 (126 ratings) | 4.2 (6 ratings) — better |
| Positive reviews | 57.4% of reviews | 71.4% of reviews — better |
| Number of ratings | 126 — better | 6 |
| Update frequency | Every 6 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | #11 — better | #195 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 68 MB | 16 MB |
| Age rating | 17+ | 17+ |
| Developer | Keaton Benning, LLC | Cynthia Ruiz |
Customer experience
Nject
SemaCalc
Bugs and requests
Nject
Reported bugs
10 issues- App crashes when selecting syringe option
- Syringe dropdown menu fails to load options
- Screen doesn't scroll to reveal calculate button after data entry
- Force closing on both iOS and Android devices
- Stuck on single medication screen (Semaglutide) with no navigation
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- Info button repeatedly triggers review window instead of showing help
- Semaglutide advertisement prevents completing calculations
- Decimal point entry not functioning properly
- App crashes after recent Semaglutide update
- Incorrect Comfortox syringe image (shows insulin syringe instead)
Requested features
9 requests- Add Comfortox 0.5mL syringe option
- Add TB (tuberculin) syringe options
- Add allergen/product selection dropdown (Botox, Dysport, Azzalure, etc.)
- Visual indicator showing exact pull location on syringe for specific units
- Support for mg/mL dosing (for Semaglutide, tirzepatide, compounded medications)
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- Removable Semaglutide advertisement
- Back button for navigation
- Improved syringe image clarity and accuracy
- Support for more injectable medications beyond toxins
SemaCalc
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Nject
No in-app purchases
SemaCalc
No in-app purchases
Questions
Is Nject free?
Is SemaCalc free?
Which has better reviews, Nject or SemaCalc?
Do Nject or SemaCalc have ads?
Which is updated more often, Nject or SemaCalc?
Which is more popular, Nject or SemaCalc?
Other comparisons
