# OnePetri — AI-Powered Petri Dish Analysis > AI-powered app for automated petri dish plaque counting and assay calculations. (iPhone/iPad app by Michael Shamash.) - Source: https://appshunter.io/ios/app/onepetri/id1576075754 (this page in markdown: same URL + `.md`) - Developer: [Michael Shamash](https://appshunter.io/developer/604696747) - Category: Utilities, Productivity - Price: $0.99 - Rating: 3.10/5 from 7 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 9 MB - Languages: American English - Released: 2021-07-24 - Data updated: 2026-08-24 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/onepetri/id1576075754/reviews.md ## What is OnePetri? Harness the power of AI and accelerate common microbiological petri dish assays with OnePetri! Tired of manually counting plaques on petri dishes? Count plaques in near real-time with OnePetri, an automated plaque counting iOS app! OnePetri currently supports bacteriophage plaque-based assays, with support for bacterial CFU counts coming in a future release! === About OnePetri === OnePetri uses machine learning models & computer vision to automatically detect petri dishes and plaques, count plaques, and perform common assay calculations with these values (plaque/titration assay). Note that as of now, OnePetri only works with circular petri dishes; however, other shapes (square & rectangle) may be added if sufficient training images can be obtained. Additionally, the models used in the app require one plate per dilution, and as such, spot assays are not currently supported. All image processing & detection is done locally on-device, with no need for an internet connection once the app has been installed. As such, OnePetri does not collect, store, or transmit any user data or images. Updates are likely to be released regularly, so regular access to the internet is strongly recommended. === Plaque count accuracy & validation === There are no restrictions on how OnePetri is used; however, the models included in the app may occasionally miscount plaques (too many, or too few) and this could affect downstream experiments and calculations. As such, all counts done by the app should always be validated by manual counting or another established "gold standard", especially in cases where it is critical to know precise values (ie. phage titration for phage therapy). The model accuracy will improve with each release thanks to additional training data provided by the community. OnePetri is completely open source, with the initial training dataset and app source code publicly available! For more information on how to contribute to the app's codebase, please visit the OnePetri website (https://onepetri.ai). ## Key features - AI-powered plaque detection - Automated plaque counting - Real-time assay calculations - Local on-device image processing - Supports bacteriophage assays - Open-source code and dataset ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/onepetri/id1576075754/reviews.md ### 1/5 — Bad count *2025-01-18* It was very bad at counting colonies and counted much lower on a plate I counted myself. I counted 21 and the app gave a count of 3. Not accurate. Don’t recommend. ### 5/5 — Great! *2023-08-04* Just one suggestion. can you do a bacteria colony identifier ## Frequently asked questions about OnePetri ### What is OnePetri used for? OnePetri uses AI and computer vision to automatically detect and count plaques on petri dishes. It also performs common assay calculations based on these counts, primarily for bacteriophage plaque-based assays. ### Does OnePetri require an internet connection? No, all image processing and detection are done locally on-device. Once installed, an internet connection is not needed for the app to function, though regular internet access is recommended for updates. ### How accurate is OnePetri's plaque counting? The app's models may occasionally miscount plaques. It is recommended that all counts be validated by manual counting or another established method, especially for critical experiments like phage titration. ### What types of petri dishes does OnePetri support? Currently, OnePetri only works with circular petri dishes. Support for square and rectangular shapes may be added in the future if sufficient training data becomes available. ### Is OnePetri free to use? OnePetri is a paid application, available for $0.99. It does not have in-app purchases or advertisements. ### What devices is OnePetri compatible with? OnePetri is available for iPhone, iPad, and iPod devices. It has an age rating of 4+. ### How often is OnePetri updated? Updates are likely to be released regularly. The latest version is 1.1.4, last updated on November 7, 2025. ### Can I contribute to OnePetri? Yes, OnePetri is completely open source. The initial training dataset and app source code are publicly available, and contributions can be made by visiting the OnePetri website. ## Version history (last 5 releases) ### 1.1.4 — 2025-11-07 - Updated website URL ### 1.1.3 — 2023-06-30 - Updated website URL ### 1.1.2 — 2023-03-25 - Removed option to email photos ### 1.1.1 — 2022-04-06 Thank you for using OnePetri! This release includes a machine learning model update that significantly improves detection times while also reducing the app's overall size. Stay tuned for more exciting feature & model updates! What's New: - Reduced machine learning model file sizes by 85%, significantly reducing the overall size of the OnePetri app (compared to v1.0.1-8) - Reduced time needed to detect Petri dishes and plaques - Fixed bug where some icons may not render properly on iOS 13 - Minor changes to default detection thresholds for Petri dishes and plaques - User experience enhancements ### 1.1.0 — 2022-04-03 Thank you for using OnePetri! This release includes a machine learning model update that significantly improves detection times while also reducing the app's overall size. Stay tuned for more exciting feature & model updates! What's New: -Reduced machine learning model file sizes by 70%, reducing final size of app on device -Reduced time needed to detect Petri dishes and plaques -Fixed bug where some icons may not render properly on iOS 13 -Minor changes to default detection thresholds for Petri dishes -User experience enhancements ## Apps similar to OnePetri | App | Rating | Price | Category | | --- | --- | --- | --- | | [Miitems](https://appshunter.io/ios/app/miitems/id1464179200) | — | Free | Utilities | | [TCI Bitacora](https://appshunter.io/ios/app/tci-bitacora/id1464209780) | — | Free | Utilities | | [Livly Hub](https://appshunter.io/ios/app/livly-hub/id1464225200) | 4.7 (13) | Free | Utilities | | [龙嘉SCM供应商](https://appshunter.io/ios/app/scm/id1459545200) | — | Free | Utilities | | [A-note](https://appshunter.io/ios/app/a-note/id1454807560) | — | Free | Utilities | | [Pusher for Firebase](https://appshunter.io/ios/app/pusher-for-firebase/id1450720020) | 5.0 (1) | $0.99 | Utilities | --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*