Comparison

High Precision Calc vs iStory

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

Head to head
About

High Precision Calc

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The high-precision calculator supports up to 100,000 precision calculations, rich system functions, variable management, and complex dimension operations. 【High-precision calculation】 Support up to 100,000 precision calculation, and the calculation accuracy can be dynamically modified. 【Variable Management】 Provide variable storage function, which can store intermediate calculation results, and import and export with one click when applying, so as to easily grasp the calculation results. 【System Functions】 Support rich system functions, covering basic mathematical applications, including trigonometric functions, exponential functions, basic mathematical functions, etc. 【Complex number operation】 Complex dimension operations are supported, and system functions are compatible with complex number operations.

About

iStory

Relive your digital history by exploring all the Apple devices you've owned and the memories captured with them. This app organizes your photos by device, provides insightful statistics, and allows you to export visual summaries of your tech journey.

Highlights
  • Device archive of owned Apple products
  • Photo timeline organized by device
  • Device and photo statistics
  • Exportable infographics
  • Offline use
  • Privacy-focused data collection
Read full description

Introducing iStory: Your Personal Apple Device Archive and Photo Journey Ever wondered about the amazing memories captured through your Apple devices over the years?  With iStory, relive your digital journey like never before! This innovative app offers a unique experience, allowing you to seamlessly explore all the Apple devices you've owned and cherish the moments captured with them. Key Features: Device Archive: Dive into the past and rediscover the evolution of your Apple devices. iStory compiles a comprehensive archive, showcasing every iPhone, iPad and iPod that you've ever owned. Track the progression of technology in your life and see how far you've come! Photo Timeline: Unearth the treasure trove of memories stored on your devices. iStory intelligently organizes all your photos based on the device they were taken with. Scroll through your personal photo timeline and witness the moments that shaped your life. From your first iPhone to the latest iPad, every picture tells a story. Device and Photo Statistics: Delve into the numbers behind your digital history! iStory provides insightful statistics on the devices you've owned, and the photos taken over the years. Discover fascinating trends and patterns that highlight your tech and photographic preferences. Exportable Infographics: Turn your digital journey into a visual masterpiece! iStory allows you to export a personalized infographic summarizing your device history and photo statistics. Share these infographics on social media or keep them as a unique keepsake of your tech-savvy adventures. Privacy First: iStory prioritizes your privacy. You can use the app offline, no data is collected in any way. Enjoy the benefits of reliving your digital history without compromising on security. Download iStory now and embark on a captivating journey through your Apple device legacy.  Rediscover the magic of your digital moments and celebrate the evolution of technology in your life! Note: iStory is not affiliated with Apple Inc. and works independently to provide a personalized digital archive experience. Check our privacy policy at: https://istory.timelabs.io#privacypolicy. Terms and conditions: https://istory.timelabs.io#terms

Screenshots

High Precision Calc4 screens
iStory3 screens

Verdict

The call

The clearest difference is price: iStory at Free against High Precision Calc's $1.99. High Precision Calc's advantage is update cadence (fortnightly vs every 5 months) and device support (4 vs 1). On ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

iStory is free to download; High Precision Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

High Precision Calc ships an update fortnightly, iStory every 5 months. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 5 level
High Precision Calc versus iStory: the parameters behind the verdict, then further details
ParameterHigh Precision CalciStory
Price$1.99Free — better
Rating—4.7 (14 ratings) — better
Number of ratings—14 — better
Update frequencyFortnightly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS13 — better17.0
Further details — not scored
Size37 MB12 MB
Age rating4+4+
Developer嘉欣 胡Timelabs Ltd

In-app purchases

None

High Precision Calc

No in-app purchases

None

iStory

No in-app purchases

Questions

Is High Precision Calc free?
High Precision Calc costs $1.99, with no in-app purchases.
Is iStory free?
iStory is free to download, with no in-app purchases.
Do High Precision Calc or iStory have ads?
Neither High Precision Calc nor iStory shows ads.
Which is updated more often, High Precision Calc or iStory?
High Precision Calc ships an update fortnightly, and iStory every 5 months. Most recently, High Precision Calc was updated on October 30, 2026 and iStory on October 24, 2026.

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