Steroid Plotter vs SteroidPlanner vs CycleVitals: Which One Actually Helps You Plan Responsibly?

TL;DR

• SteroidPlanner: quick, minimalist half-life plotter with a compound/ester table. Handy but bare-bones. 

• SteroidPlotter: fuller plotter with example protocols plus testosterone unit converter and free-T calculator; adds Tmax notes but still a modeling tool. 

• CycleVitals: a privacy-first planner that connects half-life awareness to interaction checks, AI-assisted lab trends, unit/dose conversions, and exportable records - context the plotters don’t offer. 
  
  

Snapshot: What each product actually does

Understanding Steroid Properties

When it comes to planning a responsible steroid cycle, understanding the properties of each compound is essential. The half life of a particular compound determines how long it remains active in your body, directly influencing blood levels, active dose, and the timing of your schedule. For example, Deca (Decadurabolin) has a half life of about 14 days - meaning that after your last dose, the active amount in your system drops by half every two weeks. This knowledge is crucial for anyone looking to accurately plan their cycle and avoid unwanted peaks or troughs in steroid levels.

The concept of active dose goes beyond the total amount injected; it’s about how much of the compound is actually available in your body at any given time. Factors like the use of castor oil as a carrier, or the specific ester attached to testosterone (such as enanthate or boldenone), can significantly affect compound release and overall pharmacokinetics. Each ester changes how quickly a steroid is absorbed and metabolized, which in turn impacts blood levels and the duration of action.

Introducing a new compound into your cycle requires careful consideration of its unique properties. Overlapping half lives or mismatched release rates can lead to higher-than-expected blood levels, increasing the risk of side effects. That’s why it’s important to compare compounds, understand their individual profiles, and plan your doses and schedule accordingly. Tools like the plotter on this website allow you to visualize how different steroids build up and clear from your system over time, making it easier to spot potential issues and adjust your plan.

Sharing your cycle plan with others - whether on forums or with a clinician - is also made simpler with features like shared URLs. This lets you reference specific compounds, doses, and timing, ensuring everyone is on the same page about your approach. Accurate calculation of dosage, taking into account the volume of each injection and the clearance rate of each compound, helps you avoid excessive levels and supports safer, more effective results.

Whether you’re working with familiar compounds like Anavar or Deca, or exploring less common options such as Ment, understanding their half life, active dose, and pharmacokinetics is key. Reliable studies and up-to-date information provided by the website’s team ensure you have access to the latest data, so you can make informed decisions. The plotter tool is especially useful for visualizing compound release, comparing different steroids, and planning a cycle that fits your goals while minimizing risks.

Ultimately, taking the time to understand the properties of each compound—how they’re absorbed, how long they last, and how they interact—empowers you to create a personalized, responsible cycle. With regularly updated resources and a commitment to accuracy, the website helps individuals at every experience level navigate the complexities of steroid planning with confidence.

What SteroidPlanner does well (and where it stops)

Strengths

• Minimal friction: select compound/ester, schedule, plot.

• Handy Sustanon 250 ester breakdown and a half-life table (37 entries shown) with literature references and the decay formula.

Limits to keep in mind

• No unit conversion tools, no interaction view, no lab tracking or exports—so you’re getting a graph, not a planning system.

• The half-life table and decay formula provide estimates only; values are approximate and not intended as precise or medical advice.

• Donation addresses and a general “as-is” disclaimer underline it’s an information page, not a personal record.

Bottom line: Great to eyeball a curve. Not built for longitudinal, privacy-safe health tracking.

What SteroidPlotter does well (and where it stops)

Strengths

• A more feature-rich plotter: adjustable schedules, multi-compound graphs, and example protocols. The plotter helps users determine when a drug is effectively cleared from the body based on its half-life.

• Adds utility tools: Testosterone Unit Conversion and Free & Bioavailable T calculators.

• The FAQs explicitly call out Tmax and why “half-life ≠ 50% at day X,” plus model limitations—good harm-reduction messaging.

Limits to keep in mind

• Still a modeling/visualization tool. There’s no interaction checker, no lab trend timelines, and no private record system with exports.

• Publicly claims “20,000 people” use it monthly and invites donations; again, you’re using a free web tool, not a personal health workspace.

Bottom line: Best-in-class plotter with handy calculators, but stops short of the planning and evidence context most people actually need.

Where CycleVitals beats both (educational features that matter)

1. From a curve to context you can actually use

   CycleVitals frames half-life visuals alongside Tmax/steady-state explanations—then connects them to your own records (labs, notes, timelines). The intent isn’t “tell you what to do”; it’s to help you understand patterns over time with proper caveats. 

2. Interaction Checker (choose 2+ compounds)

   Select compounds to see risk signals, mechanism categories, and timing windows (e.g., peak overlaps, accumulation to steady-state). It’s research-first and educational, designed to surface questions for a clinician, not to prescribe behavior. 

3. AI-assisted Lab Trends

   Track and visualize markers (lipids, hematocrit, estradiol, etc.) and generate exportable PDFs/CSV/JSON to share with a professional. This is what bridges the gap from “math on a chart” to real biology over time - which neither plotter handles. 

4. Concentration-aware unit & dose conversions

   Convert mg ⇄ mL ⇄ IU with potency fields (mg/mL, IU/mL) to keep your records coherent and auditable - something most generic converters don’t handle cleanly. 

5. Privacy-first app design

   You get a private workspace with structured data and clinician-friendly exports—rather than a public “calculator page” or share-only links. 

Educational guardrails: CycleVitals content and product copy repeatedly emphasize no medical advice and legal/safety disclaimers—keeping harm-minimization front and center. 

Real-world scenarios: how blood levels experiences differ

• “I plotted my cycle - now what?”

  • Plotters: You’ve got a curve; interpreting next steps is on you. 

  • CycleVitals: You can link that curve to your lab timeline, run an interaction check for your stack, and export a clean PDF to discuss with a clinician. 

• “My labs shifted - was it timing or interactions?”

  • Plotters: No lab context. 

  • CycleVitals: Overlay lab trends with half-life build-up/clearance and see potential peak-overlap windows flagged by the interaction checker. 

• “I’m mixing units and concentrations.”

  • SteroidPlotter: Has a general unit converter (nmol/L ↔ ng/dL) and Free-T calc—useful for blood results. 

  • CycleVitals: Adds concentration-aware dose conversions to keep your cycle records internally consistent (mg⇄mL⇄IU with potency). 

Feature comparison: half life (deeper dive)

Half-life & timing model

• SteroidPlanner: Simple exponential decay with formulas shown on page; sources cited, including Behre & Nieschlag for testosterone esters. Half-life and pharmacokinetic values are sourced from published studies and internet databases, and these values may vary between sources. Some reference sources on the internet may become unavailable, so reliable data retrieval is important for accurate cycle planning.

• SteroidPlotter: Adds Tmax awareness in FAQs, acknowledges model limits; compound data tracked in a linked sheet.

• CycleVitals: Uses half-life awareness as context inside a broader health-record workflow; not a dosing engine.

Utilities & calculators

• SteroidPlanner: None beyond the plot.

• **SteroidPlotter:**Unit converter and Free-T page.

• **CycleVitals:**Concentration-aware dose converter and Peptide mixing caluculator, plus app-level features (interaction checker, lab analytics).

Records, privacy, export

• SteroidPlanner & SteroidPlotter: Mostly single-page tools with crypto donation blurbs; not positioned as private records.

• **CycleVitals:**Private workspace with PDF/CSV/JSON exports for clinician review and full account you can use for history and future planning.

Who should use what? (Educational guidance)

• If you only need a quick, public graph: SteroidPlanner or SteroidPlotter fit. They’re free calculators; just remember they’re simplified models with explicit limitations. 

• If you want a safer planning environment: CycleVitals adds interaction awareness, lab trends, privacy, and exports - the things that matter when you want to reduce confusion and talk to a clinician with evidence in hand. 

FAQ

Does CycleVitals give me dosing instructions?

No. CycleVitals is educational software - for organizing information, spotting patterns, and generating clinician-friendly summaries. It does not provide dosing or medical advice. 

Can I still “just plot a curve” in CycleVitals?

Yes—you can visualize half-life context. The difference is you can also connect that visualization to lab timelines and interaction flags in a private workspace. 

What about unit conversions?

SteroidPlotter includes general testosterone unit conversion and a Free-T calculator. CycleVitals focuses on concentration-aware conversions for cycle record-keeping (mg⇄mL⇄IU with potency). Many users will use both styles at different times. 

Bottom line

• SteroidPlanner and SteroidPlotter are useful plotters—they help you visualize an idea. 

• CycleVitals is a planner - it connects the idea to your own data (labs, units, interactions) in a private workspace with exports, so your next conversation with a professional is clearer and safer. 

Create a free CycleVitals account to see interaction flags, lab trends, and half-life context in one place-- educational only, never medical advice.