PeterJohn NumPy vs Vision Detector
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
PeterJohn NumPy
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****PeterJohnNumPyV4 Now You Can Use NumPy 1.20.2 on CPython3.9.9. ****How To Use NumPy on PeterJohnNumPyV4;; Go To "TutorialSeason003/scripts/s007LSTMtrainingPlot.py". Then "Run Script". ****Not Yet implemented Features;; Basically, you Can Use all Functions of numpy.ndarray. **1; numpy.random;; please use Python3 Standard "random" module instead of it. 1.1); numpy.random.randn();; So we implemented pjRandN() function using NumPy and Python3 Standard "random" module. Documents/TutorialSeason003/scripts/pjLStermMemory.py;pjRandN() **2; numpy.linalg;; 2.1); numpy.linalg.norm();; So we implemented pjNorm() function using NumPy instead of it. Documents/TutorialSeason003/scripts/pjLStermMemory.py;pjNorm() 2.2); numpy.linalg.qr();; So we implemented pjQR() function using NumPy instead of it. Documents/TutorialSeason003/scripts/pjLStermMemory.py;pjQR(); **3; numpy.diag();; Basically, you Can Use all Functions of numpy.ndarray, so Please use numpy.ndarray.diagonal() instead of it. **4; numpy.fft;Β Not Yet implemented. **5; numpy.polynomial;;Β Not Yet implemented. **6; numpy.ctypeslib;;Β Not Yet implemented. ****When you Use this App withOut NumPy;; Using iPhone's "Files.app", Delete the NumPy's "__pycache__" folder below. Documents/PeterJohnNumPyV4/usrLocal/lib/python3.9/site-packages/numpy/__pycache__ If there doesNot Exist the NumPy's "__pycache__" folder, when you touched "Edit Script", this App Calls "Py_FinalizeEx()" So you Can Enjoy Scripting Comfortably. ****the WorkAround against the Well-Known Bug of NumPy and Python3.9;; NumPy and Python3.9 have a Well-Known Bug. While NumPy has been imported, "Py_FinalizeEx()" doesNot Release memory. So If you imported NumPy at the Second time, Python3 Crashes. so we made a WorkAround against the Well-Known Bug of NumPy and Python3.9. As the Specification of this App, If there Exists the NumPy's "__pycache__" folder, Documents/PeterJohnNumPyV4/usrLocal/lib/python3.9/site-packages/numpy/__pycache__ Even if you touched "Edit Script", this App doesNot call "Py_FinalizeEx()" This is Not a Perfect Solution But you Can Enjoy NumPy withOut Python3 Crashing. ****1st Corinthians 10:31, GNT; 10:31 Well, whatever you do, whether you eat or drink, do it all for God's glory. Enjoy NumPy on PeterJohnNumPyV4. Best Regards, --Yasushi Yassun Obata
Vision Detector
Easily test and evaluate Core ML models on your iPhone or iPad. Load your own models from various cloud services or local storage and run them using live camera feed or stored images. Supports image classification, object detection, and style transfer.
- Run Core ML models on device
- Load models from cloud storage
- Live camera feed inference
- Image classification support
- Object detection support
- Style transfer support
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Vision Detector is an AI image analysis tool that supports CoreML machine learning models, multi-modal Large Language Models, and on-device Apple Intelligence. Choose the mode that best fits your use case. You can choose one of the following image input sources: - Live video by the built-in camera - Still image by the built-in camera - Photo Library - Files (iCloud, Google Drive, Dropbox, etc.) For live video inputs, continuous inference is performed on the camera feed. However, the frame rate and other parameters depend on the device. # Notification Center Vision Detector can call Notification Center for predefined conditions. Broadcasting notifications sends notifications to all Apple devices signed in with the same Apple Account. ## CoreML Mode Vision Detector locally executes CoreML models using Appleβs Vision framework. Before using this mode, prepare a machine learning model in the CoreML format (.mlmodel or .mlpackage) using Create ML. Import ML models via iCloud or AirDrop. Vision Detector supports the following types of CoreML models: - Image classification - Object detection - Object Segmentation - Style transfer Built-in Vision framework is also available for human mask and image classification. ## Vision LLM Mode Vision Detector can use multi-modal large language model (LLMs). Define what to do with the prompt as follows: - If the image is a screenshot, answer the name of the software - Call a notification when you see a cat - Count the number of persons in the image, and notify when it changes ## Apple Intelligence mode The images are completely processed on your device locally with your prompt.
Screenshots
Verdict
The clearest difference is price: Vision Detector at Free against PeterJohn NumPy's $9.99. Vision Detector also leads on update cadence (every 5 days vs every 2 weeks). PeterJohn NumPy's advantage is iOS requirement (15.0 vs 18.2). On ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Vision Detector is free to download; PeterJohn NumPy costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PeterJohn NumPy ships an update every 2 weeks, Vision Detector every 5 days. Both last shipped on November 3, 2026.
| Parameter | PeterJohn NumPy | Vision Detector |
|---|---|---|
| Price | $9.99 | Free β better |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Every 2 weeks | Every 5 days β better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | β | Free |
| Devices | iPhone, iPod | iPhone, iPad, Mac β better |
| Requires iOS | 15.0 β better | 18.2 |
| Further details β not scored | ||
| Size | 222 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasushi Obata | Kazufumi Suzuki |
In-app purchases
PeterJohn NumPy
No in-app purchases
Vision Detector
No in-app purchases
Questions
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Is Vision Detector free?
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Which is updated more often, PeterJohn NumPy or Vision Detector?
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