# Multi vs OnePetri

The clearest difference is price: Multi at Free against OnePetri's $0.99. Multi also leads on rating (4.5 vs 3.0) and update cadence (every 2 weeks vs every 6 months). OnePetri's advantage is in-app purchases (none vs 8) and iOS requirement (13.0 vs 16.0). On ads and device support there is nothing between them.

Multi is free to download; OnePetri costs $0.99 up front. Multi sells 8 in-app purchases, starting at $3.99 per month. OnePetri asks for nothing beyond the download.

Multi holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Multi has 697 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 64% of Multi's written reviews are positive against 50% of OnePetri's.

Multi ships an update every 2 weeks, OnePetri every 6 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Multi | OnePetri |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (697 ratings)](https://appshunter.io/ios/app/multi-stopwatch/id933638040/reviews)** | [3.0 (8 ratings)](https://appshunter.io/ios/app/onepetri/id1576075754/reviews) |
| Number of ratings | **697** | 8 |
| Positive reviews | **63.6% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 months |
| Monetization | Subscription | **Paid** |
| Size | 26 MB | 9 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Applorium Ltd](https://appshunter.io/developer/1688522804) | [Michael Shamash](https://appshunter.io/developer/604696747) |

## What reviewers say

### Multi

[App page](https://appshunter.io/ios/app/multi-stopwatch/id933638040)

This app offers multiple stopwatches with advanced features like parallel or sequential timing modes. It's designed for tracking multiple events or participants simultaneously, with customizable displays and background operation for accurate timing.

**Highlights:** Multiple stopwatches, Parallel and Sprint modes, Customizable display options, Background operation, Apple Watch support, Haptic feedback

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Multi-Stopwatch Pro | $3.99 | per month |
| Multi-Stopwatch pro | $9.99 | per year |
| Yearly | $19.99 | per year |
| Remove Ad | $0.99 | one-time |
| Stopwatch Pro | $5.99 | one-time |
| Multi Stopwatch Pro | $19.99 | one-time |
| Multi Stopwatch Pro | $39.99 | one-time |


### OnePetri

[App page](https://appshunter.io/ios/app/onepetri/id1576075754)

Automate the counting of plaques on petri dishes using AI and computer vision. This app performs common assay calculations and processes images locally on your device for privacy. It supports bacteriophage plaque-based assays with future plans for bacterial CFU counts.

**Highlights:** AI-powered plaque detection, Automated plaque counting, Real-time assay calculations, Local on-device image processing, Supports bacteriophage assays, Open-source code and dataset

**In-app purchases:** none


## Frequently asked questions

### Is Multi free?

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

### Is OnePetri free?

OnePetri costs $0.99, with no in-app purchases.

### Which has better reviews, Multi or OnePetri?

Multi is rated higher. Multi averages 4.5 out of 5 from 697 ratings, while OnePetri averages 3.0 from 8 ratings.

### Do Multi or OnePetri have ads?

Neither Multi nor OnePetri shows ads.

### Which is updated more often, Multi or OnePetri?

Multi ships an update every 2 weeks, and OnePetri every 6 months. Most recently, Multi was updated on November 1, 2026 and OnePetri on October 24, 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.*