Practical AI tools for everyday life
GradFlowLab builds apps that solve real problems — identify jewelry from photos, write in markdown, find calm through meditation, sleep better with sound, and create ID photos at home.
* Eight apps · Apple platforms · No tracking
Apps for every part of your day
From identifying jewelry to finding focus — each app is built to do one thing well.
Jewelry Expert
AI Identifier for Gems & Jewelry
Markdown NotesMarkdown Notes
Write, Preview, Export & Widget
Buddha AI
Wisdom & Meditation Dialogue
Zen Heart
Zen Wisdom & Dialogue
White Noise Sleep Sounds
Rain, Relax & Sound Machine
Flash AI PhotoFlash AI Photo
ID Photo Maker Pro
Skin Condition Identifier LensSkin Condition Identifier Lens
Identify Skin Conditions Fast
StockShield
Vietnamese Stock Safety Intelligence
Pokémon TCG ScannerPokémon TCG Scanner
PSA Grade & eBay Sold Comps
Snake IDSnake ID
Venomous? Snap to Find Out.
Pet Passport: US-JP TravelPet Passport: US-JP Travel
USDA, MAFF, HDOA & CDC Pre-fill
BugLensBugLens
Identify Bugs, Bites & Snakes
AnyFaceAnyFace
Face Swap for Photos & Videos
TalkFaceTalkFace
AI Talking-Photo Video
Stamp IdentifierStamp Identifier
Find Value & Catalog Numbers
TOEIC Ready
Hit your TOEIC target, or your money back
* Featured App
Jewelry Expert
AI Identifier for Gems & Jewelry
Snap a photo and get instant expert analysis of any gem, ring, necklace, or bracelet. AI identifies materials, gemstones, hallmarks, style era, condition, and estimated value — no appraiser needed for a fast first-pass assessment.
- Instant AI-powered jewelry identification from photos
- Detailed gemstone analysis — type, color, clarity, cut, carat, and rarity
- Metal detection with hallmark and karat verification
- AI-derived market value estimation ranges
AI Identifier for Gems & Jewelry
Jewelry Expert
iOS
* How we ship
Small studio. Big polish.
We're a one-person studio in Tokyo. Every app is built fast, tested in the wild, and shipped without growth-hacking, dark patterns, or VC pressure.
- 01
On-device when it can be
Photos, notes, audio — kept on your device whenever the model allows. Cloud only when there's no other way.
- 02
No accounts, no funnels
Open the app and use it. No sign-up wall, no email capture, no analytics pixel watching what you tap.
- 03
Pay once or don't pay
Most apps offer a one-time unlock. The few subscriptions exist because the AI inference genuinely costs us money.
- 04
Built in public, shipped fast
Each app went from idea to App Store in weeks, not quarters. We iterate based on what real users tell us.
* Latest guides
Latest guides
Plain-language, crawlable answers to common questions about jewelry identification, gemstones, and more.
How to Identify Jewelry with AI: A Complete Guide
Learn how AI-powered jewelry identification works, what information you can get from a single photo, and how to use the Jewelry Expert app to analyze your pieces.
How to Identify Gemstones at Home: AI vs Traditional Methods
Compare traditional gemstone identification methods with modern AI-powered tools. Learn what each approach can tell you and when to use which.
Understanding Jewelry Hallmarks: What Those Tiny Stamps Mean
A guide to reading jewelry hallmarks — purity marks, maker's marks, and assay marks. Learn what the stamps on your jewelry mean and how AI can help identify them.
* FAQ
Common questions
01What apps does GradFlowLab make?
GradFlowLab builds AI-powered apps including Jewelry Expert for jewelry identification, Markdown Notes for distraction-free writing, Buddha AI and Zen Heart for meditation and mindfulness, White Noise Sleep Sounds for sleep and focus, and Flash AI Photo for ID photos.
02What can Jewelry Expert detect from a photo?
It identifies metals, gemstones, hallmarks, style era, condition, and an estimated value range from jewelry photos. It mirrors the assessment criteria a gemologist would use.
03Are the apps free?
Most apps are free to download with optional premium features via subscription. Markdown Notes is a one-time $0.99 purchase, and Flash AI Photo is completely free.
Have an AI idea you want shipped?
We design, build, and submit AI-powered apps to the App Store — quickly, end-to-end, and without the agency overhead.