学霸君 vs Bio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
学霸君
This app utilizes the Ebbinghaus forgetting curve to create personalized vocabulary review plans, helping users master a vast amount of words. It includes word lists for various English proficiency levels and exams, aiding in improving speaking, listening, reading, and writing skills.
- Ebbinghaus memory curve for vocabulary
- Personalized review plans
- Extensive word lists for various exams
- Improve speaking, listening, reading, writing
- Supports multiple English proficiency levels
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[专属单词助手] 利用艾宾浩斯记忆曲线,精准定位每个单词的遗忘临界点.量身打造复习计划,轻松掌握海量词汇~ [包含各级词书] 收录初中/高中/四级/六级/考研/IELTS/TOEFL/SAT/GRE/GMAT等各类词书~ [适合各类人群] 助您轻松通过期中/期末/中考/高考/成考/自考/四级/六级/考研/雅思/托福/SAT/GRE/GMAT等各类英语考试~ [应对各种场景] 助您学口语/练听力,提升阅读和写作能力~
Bio
This scientific assistant provides researchers and students with essential tools for everyday lab calculations. It offers modules for protein and nucleic acid conversions, solution preparation, microbiology, and buffer recipes. Streamline your laboratory workflow with precise and efficient scientific computations.
- Protein & Peptide Conversion
- Nucleic Acid & Genomics Toolkit
- Biochemistry & Solution Preparation
- Microbiology & Cell Culture Tools
- Buffer & Solution Preparation Library
- Native iOS Performance
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Bio-Calculator 2.0 is a professional mobile application tailored for researchers, students, biotech developers, and laboratory professionals. More than just a toolset, it is your high-efficiency scientific assistant at the laboratory bench. 【Comprehensive Feature Modules】 1. Protein & Peptide Conversion • Precisely convert between Protein Size (kDa), Mass (mg), and Moles (nmol). • Estimate DNA/mRNA coding capacity based on protein molecular weight. • Protein Molarity conversion with built-in common protein data. 2. Nucleic Acid & Genomics Toolkit • Sequence MW Calculation: Input DNA/RNA sequences to automatically obtain molecular weight and GC content. • Molar Conversions: Switch between nucleic acid length (bp/nt), mass, and moles. • Absorbance Conversion: Quickly convert OD260 readings into nucleic acid mass concentration. • Ligation Reaction: Intelligently calculate vector-to-insert molar ratios for cloning experiments. • Nucleic Acid Concentration: Convert between mass concentration and molarity. 3. Biochemistry & Solution Preparation • Molarity Calculator: Built-in database of thousands of compounds and reagents for instant mass and concentration calculations. • Dilution Calculator: Full support for C1V1 = C2V2 calculations across various concentration units. • Centrifugation: Precise conversion between Relative Centrifugal Force (RCF/g) and Revolutions Per Minute (RPM) based on rotor radius. • Temperature Units: Covers various scales including Celsius, Fahrenheit, and Kelvin. • Molecular Weight: Calculate accurate MW based on compound formulas. • Concentration Conversion: Switch between mass concentration and molarity for solutions. 4. Microbiology & Cell Culture • Growth Prediction: Predict microbial doubling time based on two OD measurements. • CFU Counter: Automatically process serial dilution data to calculate viable cell concentration. • TCID50: Essential Tissue Culture Infectious Dose calculations for virology. • Dilution Planning: Strategic planning for colony counting dilutions. 5. Massive Buffer & Solution Preparation Library Step-by-step preparation guides for 100+ standard lab solutions: • Stock Solutions: EDTA, Tris-Cl, DTT, IPTG, ATP, HEPES, and more (includes sterilization and storage advice). • Buffer Systems: PBS, D-PBS, TAE, TBE, RIPA Lysis, Co-IP, SSPE, etc. • Each guide includes component ratios, sterilization methods (Autoclave vs. Filter), storage temperatures, and safety precautions. Why choose BioCalculator 2.0? • Native Performance: Built natively for iOS with a modern, intuitive UI and silky-smooth operation. • Industry Focused: From biotech startups to academic labs, our tools fit your daily workflow perfectly. • Global Science Calculator: Unique floating window design allows you to access scientific calculations from anywhere. • Laboratory Precision: Say goodbye to floating-point errors and embrace professional scientific accuracy. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 学霸君 at none against Bio's 3. 学霸君 also leads on iOS requirement (9.0 vs 17.0). 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
Both are free to download. Bio sells 3 in-app purchases, starting at $2.99 per month. 学霸君 asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for 学霸君 against 5.0 for Bio. Both are backed by a comparable volume of ratings — 1 and 2 respectively.
Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 24, 2026.
| Parameter | 学霸君 | Bio |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 2 — better |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | 晓鹏 杨 | 杰 吴 |
Customer experience
学霸君
Bio
In-app purchases
学霸君
No in-app purchases
Bio
- Monthly Plan$2.991 Month
- Yearly Plan$19.991 Year
- Lifetime member$44.99









