# ZipGrade vs Experiment Helper

The clearest difference is in-app purchases: Experiment Helper at none against ZipGrade's 1. Experiment Helper also leads on update cadence (daily vs every 6 weeks). ZipGrade's advantage is ratings volume (36K vs 2) and iOS requirement (13.0 vs 17.6). On price, rating, ads and device support there is nothing between them.

Both are free to download. ZipGrade sells 1 one-off in-app purchase. Experiment Helper asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.9 for ZipGrade against 5.0 for Experiment Helper. That said, the two scores are not equally well evidenced: ZipGrade has 36K ratings behind it against 2, so its average is the more settled of the two.

ZipGrade ships an update every 6 weeks, Experiment Helper daily. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | ZipGrade | Experiment Helper |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (36K ratings)](https://appshunter.io/ios/app/zipgrade/id635077270/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/experiment-helper/id6777916056/reviews)** |
| Number of ratings | **36K** | 2 |
| Positive reviews | 86.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 30 MB | 4 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [ZipGrade LLC](https://appshunter.io/developer/582826575) | [Zhongda Shi](https://appshunter.io/developer/6777916058) |

## What reviewers say

### ZipGrade

[App page](https://appshunter.io/ios/app/zipgrade/id635077270)

Instantly grade multiple-choice tests and quizzes using your device's camera. This app offers a fast and accurate way for educators to assess student work, with features for organizing and exporting results. It provides immediate feedback to inform lesson planning and assignments.

**Highlights:** Instant grading with device camera, Supports multiple choice tests and quizzes, Organizes and exports results (PDF, Excel), Free answer sheet templates available, Companion website for data management, Stores results by student, subject, and quiz

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add 1 year of use | $6.99 | one-time |

**What reviewers like**

- 🚀 Efficient grading
- 👍 Instant feedback for students
- 📊 Detailed data analysis
- 💰 Affordable subscription
- ⏱️ Time-saving

**What reviewers complain about**

- 🐛 Inconsistent scanning issues
- 🔍 Difficulty navigating interface
- 🔢 Lack of class/student grouping options
- 🖼️ Poor image quality for student names

**Reported bugs**

- Scanning issues with flat surface detection
- Incorrect answer marking due to eraser marks

**Requested features**

- Ability to change question point values in bulk
- Option to create/edit answer keys on website
- Support for non-multiple choice question types
- Improved data export/integration with other systems


### Experiment Helper

[App page](https://appshunter.io/ios/app/experiment-helper/id6777916056)

This app offers quick calculators and lookup tools for molecular biology, biochemistry, and chemical biology lab tasks. It assists with protein property calculations, DNA/RNA translation, dilution planning, and CAS number lookups.

**Highlights:** Protein property calculation, DNA/RNA translation, Dilution calculators, Transfection plasmid calculator, Cell seeding calculator, CAS number lookup

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ZipGrade free?

ZipGrade is free to download, with in-app purchases available.

### Is Experiment Helper free?

Experiment Helper is free to download, with no in-app purchases.

### Which has better reviews, ZipGrade or Experiment Helper?

Experiment Helper is rated higher. ZipGrade averages 4.9 out of 5 from 36K ratings, while Experiment Helper averages 5.0 from 2 ratings.

### Do ZipGrade or Experiment Helper have ads?

Neither ZipGrade nor Experiment Helper shows ads.

### Which is updated more often, ZipGrade or Experiment Helper?

ZipGrade ships an update every 6 weeks, and Experiment Helper daily. Most recently, ZipGrade was updated on October 17, 2026 and Experiment Helper on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*