Jayson Downloads & RevenueJayson · App Store
Jayson is #17 in Developer Tools Free in South Korea and charting in 7 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
DeveloperSimon B. Støvring
CategoryDeveloper Tools
PriceFree
Released
Rating★ 4.5 (451)
Version1.5.3
Age rating4+
First seen by us
24 Sep 2026
24 Sep 2026Installs (est.)50k+ worldwide
📈Entered the top 100📈Entered the top 100🆕Its developer released another app: Wavy Road: Endless Driving🆕First spotted by AppInsider📦Version 1.5.3
Full timeline · 23 events
- 📈Jayson entered the top 100Top Grossing · Developer Tools · JP
- 📈Jayson entered the top 100Top Grossing · Developer Tools · US
- 🆕Jayson: its developer released another app: Wavy Road: Endless Driving
- 📈Jayson entered the top 100Top Free · Developer Tools · AE
- 📈Jayson entered the top 100Top Grossing · Developer Tools · DE
- 📈Jayson entered the top 10Top Grossing · Developer Tools · KR
- 📈Jayson charting in a new countryUnited Arab Emirates
- 📈Jayson entered the top 100Top Free · Developer Tools · FR
- 📈Jayson entered the top 100Top Free · Developer Tools · BR
- 📈Jayson entered the top 100Top Free · Developer Tools · IT
- 📈Jayson entered the top 100Top Grossing · Developer Tools · KR
- 📈Jayson entered the top 100Top Grossing · Developer Tools · BR
- 📈Jayson charting in a new country in 2 chartsBrazil · India
- 📈Jayson entered the top 100Top Grossing · Developer Tools · CA
- 📈Jayson entered the top 100 in 2 chartsTop Free · Developer Tools · CA · Top Free · Developer Tools · ID
- 📈Jayson charting in a new country in 2 chartsCanada · Indonesia
- 📈Jayson entered the top 100 in 2 chartsTop Free · Developer Tools · AU · Top Grossing · Developer Tools · AU
- 📈Jayson charting in a new countryFrance
- 📈Jayson entered the top 100Top Free · Developer Tools · DE
- 📈Jayson charting in a new countryGermany
- 🆕Jayson first spotted by AppInsider#14 in Top Free · Developer Tools · South Korea
- 📦Jayson version 1.5.3No release notes
- 🆕Jayson released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.5 ★
451 ratings
Measured
Best rank now
#17
Developer Tools FreeMeasured
New ratings a week
4.8
▲ +10% vs the 2 weeks before
Measured
Jayson on the App Store
App details
App ID
1447750768
Publisher
Simon Stovring
On the store since
Feb 2019
7 years on the store
Minimum OS
iOS 26.0+
iPhone 11 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
43 MB
Jayson downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Apple publishes no download counts. App Store downloads come from chart positions and daily rating growth per country, calibrated on Google Play install counts; lifetime installs from ratings worldwide × installs per rating. Confidence is the chance the real number is within half to double ours.
Where Jayson's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Stickiness (DAU / MAU)
how many monthly users open it on a given day
Retention · share of new users still active
Day 1
Day 7
Day 30
Time spent · per daily user
Average time spent Pro
min a day
Sessions a day Pro
Time per session Pro
min
How this is calculated
Monthly users come from lifetime installs across every store, fitted on monthly active user figures companies publish; daily users = monthly × the typical daily/monthly ratio for the category. Confidence is the chance the real number is within half to double ours.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | Developer ToolsFree | #17 |
 United States | Developer ToolsFree | #76 |
 Australia | Developer ToolsGrossing | #40 |
 United Kingdom | Developer ToolsFree | #101 |
| Australia | Developer ToolsFree | #88 |
 Germany | Developer ToolsFree | #165 |
 Saudi Arabia | Developer ToolsGrossing | #98 |
| Saudi Arabia | Developer ToolsFree | #115 |
 Indonesia | Developer ToolsFree | #194 |
Apps near Jayson on the chart
Developer Tools Free, around #17.
Ratings
App Store, worldwide.
Rating
4.5 ★
451 ratings
Measured
Ratings
451
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
4.8
▲ +10% vs the 2 weeks before
Lifetime rating
4.5★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
77/100
faster than 92% of Developer Tools apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Jayson
Jayson is a JSON viewer and editor for iPhone and iPad. Browse JSON as a structure, edit values, and save your changes back to the file.
Whether you're inspecting an API response, checking a config file, or making a quick fix on the go, Jayson turns raw JSON into something you can actually read and change.
BROWSE AND EDIT
- Open JSON files stored on your device or in iCloud Drive.
- Toggle between a structured table view and syntax highlighted text.
- Add new values and keys, and save your changes back to the file.
- Parse text or the contents of a URL from your clipboard into JSON.
- Highlight a key from a child of an array to get a quick overview of your data.
TABS, SPLITS, AND WINDOWS
- Switch between files, or different objects in a single file, using tabs.
- Compare JSON in a single file or across files using multiple splits.
- Open multiple windows on the iPad.
WORKS WITH SHORTCUTS
Jayson integrates with Shortcuts, which comes in handy for debugging API calls, previewing JSON files, and building workflows around JSON.
- Pass a response from Get Contents of URL to Jayson to see how it is structured.
- Open JSON as a document you keep working on, or as a temporary preview.
- Format JSON and hand the result to the next action, using spaces or tabs.
FREE, WITH AN OPTIONAL UPGRADE
Jayson's core functionality is free. Browsing, editing, saving, splits, Shortcuts, and working with up to two tabs at a time cost nothing.
A one-time in-app purchase enables having more than two tabs open at once, switching between light and dark themes, and personalizing the app icon, accent color and type icons.
One purchase, no subscription.
Whether you're inspecting an API response, checking a config file, or making a quick fix on the go, Jayson turns raw JSON into something you can actually read and change.
BROWSE AND EDIT
- Open JSON files stored on your device or in iCloud Drive.
- Toggle between a structured table view and syntax highlighted text.
- Add new values and keys, and save your changes back to the file.
- Parse text or the contents of a URL from your clipboard into JSON.
- Highlight a key from a child of an array to get a quick overview of your data.
TABS, SPLITS, AND WINDOWS
- Switch between files, or different objects in a single file, using tabs.
- Compare JSON in a single file or across files using multiple splits.
- Open multiple windows on the iPad.
WORKS WITH SHORTCUTS
Jayson integrates with Shortcuts, which comes in handy for debugging API calls, previewing JSON files, and building workflows around JSON.
- Pass a response from Get Contents of URL to Jayson to see how it is structured.
- Open JSON as a document you keep working on, or as a temporary preview.
- Format JSON and hand the result to the next action, using spaces or tabs.
FREE, WITH AN OPTIONAL UPGRADE
Jayson's core functionality is free. Browsing, editing, saving, splits, Shortcuts, and working with up to two tabs at a time cost nothing.
A one-time in-app purchase enables having more than two tabs open at once, switching between light and dark themes, and personalizing the app icon, accent color and type icons.
One purchase, no subscription.
Latest updates
1.5.3
