Comparison

Jeyso vs Dev Notes++

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Jeyso

Features
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Master the art of data engineering with Jeyso, the premium JSON formatting studio designed for absolute focus and technical excellence. Whether you're debugging a complex API response or optimizing your data structures, Jeyso provides a sophisticated platform to manage your JSON through a high-fidelity, intuitive interface. With advanced formatting modules and an intelligent validation framework, Jeyso eliminates the noise of cluttered developer apps. Experience a refined way to stay organized, featuring immersive history logs and high-fidelity project management that celebrates your technical achievements in a secure and professional environment. KEY HIGHLIGHTS: β€’ Advanced JSON Formatting: Master your data with high-fidelity support for large JSON structures of up to 1,000,000 characters with absolute precision. β€’ Comprehensive Validation Studio: Validate and optimize your JSON through a streamlined, intuitive dashboard with customizable indentation controls. β€’ Intelligent History Framework: Monitor your data journey and revisit your projects with a high-fidelity log of up to 100 entries and 30-day retention. β€’ Mindful Developer Experience: A sleek, professional design optimized to reduce cognitive load and foster deep technical focus. β€’ Secure Data Registry: Document your JSON history and revisit your favorite structures with a high-fidelity history system. β€’ Privacy First: Your data is personal. Jeyso processes all your JSON locally on your deviceβ€”we never access or share your private technical records. WHY JEYSO? Most JSON tools feel generic and cluttered. Jeyso is designed with care β€” smooth animations, high-fidelity technical interactions, a refined design system, and a formatting framework that's actually robust. It's the developer companion you'll keep coming back to.

About

Dev Notes++

Features
Read full description

Dev Notes++ is your all-in-one companion for tracking app development. Log bugs, features, and ideas. Plan promotions. Manage App Store screenshots. Take rich text notes. See your progress on a Dashboard β€” all synced across your devices with iCloud. Track Everything Create apps and organize bugs, features, and ideas by version. Mark items as open, in progress, or done. Filter by status, type, and version β€” filters sync across devices. Quick-add by type with a long press on +. Share from Anywhere Use the system share sheet to send text, links, or images directly into Dev Notes++. Save as a Bug, Feature, Idea, Post, or Notes. URLs show a rich preview card. Share multiple images at once. Your last-used app is remembered. App Store Info Paste a Bundle ID or App Store URL to auto-import your app's icon, description, rating, in-app purchases, genres, and more from any App Store region. Dashboard See your completion rate, bug trends, 7-day activity, and stats at a glance. Filter by date range. Show or hide apps from your stats. Tap any stat card to drill down. Promote Draft social media posts with character counts for X, Threads, Bluesky, and more. Track post status from draft to published. Duplicate posts for quick variations. Screenshots Organize App Store screenshots across 65 locales. Drag to reorder. Tap to edit or view full screen. Rich Notes Write formatted notes with bold, italic, lists, and inline images. Backup & Restore Create full backups. Restore selectively β€” pick exactly which apps and items to import. Export Export to JSON & Markdown, PDF report, or CSV spreadsheet. Sync iCloud sync across all your devices. Settings, filters, and data stay in sync automatically. Free to Start Track up to 2 apps for free. Upgrade to Pro for unlimited apps, screenshots, export, global search, and more. Privacy Policy: https://myrcbox.com/privacy-policy-and-terms-dev-notes/ User Agreement: https://myrcbox.com/privacy-policy-and-terms-dev-notes/

Screenshots

Jeyso4 screens
Dev Notes++4 screens

Verdict

The call

The clearest difference is in-app purchases: Jeyso at none against Dev Notes++'s 3. Jeyso also leads on iOS requirement (17.0 vs 26.0). Dev Notes++'s advantage is update cadence (every 2 days vs monthly). On price, ads 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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Dev Notes++ sells 3 in-app purchases, starting at $3.99 per month. Jeyso asks for nothing beyond the download.

UpkeepUpdate frequency

Jeyso ships an update monthly, Dev Notes++ every 2 days. Both last shipped on October 31, 2026.

Scorecard3 real differences Β· 3 level
Jeyso versus Dev Notes++: the parameters behind the verdict, then further details
ParameterJeysoDev Notes++
PriceFreeFree
Update frequencyMonthlyEvery 2 days β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 β€” better26.0
Further details β€” not scored
Size5 MB3 MB
Age rating4+4+
DeveloperUmit UZSylvain Lafrance

In-app purchases

None

Jeyso

No in-app purchases

3 purchases

Dev Notes++

Subscriptions2
  • Dev Notes - Monthly7 Days trial$3.991 Month
  • Dev Notes - Yearly Subscription7 Days trial$24.991 Year
One-time1
  • Dev Notes - Lifetime$34.99

Questions

Is Jeyso free?
Jeyso is free to download, with no in-app purchases.
Is Dev Notes++ free?
Dev Notes++ is free to download, with in-app purchases available.
Do Jeyso or Dev Notes++ have ads?
Neither Jeyso nor Dev Notes++ shows ads.
Which is updated more often, Jeyso or Dev Notes++?
Jeyso ships an update monthly, and Dev Notes++ every 2 days. Most recently, Jeyso was updated on October 31, 2026 and Dev Notes++ on October 31, 2026.

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