Comparison

H. I. S. vs Sigmakey

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

Head to head
About

H. I. S.

Features
Read full description

The official app for our parents, students, staff and alumni, Apple Wallet passes, event notifications, widgets, offline access and Face ID. Your school day at a glance Open to a home screen built for the phone: today's date, the current temperature and conditions where you are, the next dates from every school calendar, recent alumni stories, and one-tap shortcuts to the parts of the school you use most. Home Screen and Lock Screen widgets Place the shortcuts you choose on your Home Screen or Lock Screen. Pick which actions appear, resize the widget to any size, and it adapts, more room, more shortcuts. Light and dark, English and Arabic, in the school's own typefaces. Graduation ceremony passes in Apple Wallet Add your ceremony booking to Apple Wallet in one tap: the attending parents' names, your seat count, the date, time and venue, and a QR code for the gate. It updates when the ceremony details change, and lives on your Lock Screen on the day. Notifications for the dates that matter Follow the calendar of any department and choose how far ahead you'd like to know, a day, three days or a week. Reminders arrive as notifications, on time, with no need to open the app. Works without a signal Pages, images and translations are saved on your device, so calendars, admission requirements, staff lists and library catalogues stay readable on a weak connection or none at all. The app tells you when you're offline and quietly catches up when you're back. Sign in with Face ID or Touch ID Parents, alumni and staff can unlock their portals with biometrics. Credentials are held in the device's secure keychain, never in the app itself. Everything from the school, in one place • Academic calendars, National, British, American and Kindergarten • Admission process, requirements and fees • Academics: departments, facilities, partners and staff • Students' life: activities, students' union, library catalogue and the alumni community • Gallery: photos, videos and the 360° tour • Graduation ceremony booking, extras and confirmations • Vacancies, FAQs and school information • Staff portal for administrators Arabic and English Complete right-to-left support with the school's own Arabic and Latin typefaces. The app opens in your device's language the first time and remembers your choice after that. Private by design No account is needed to browse. All traffic is encrypted over HTTPS, sign-in details stay in the device keychain, and the weather on your home screen is shown without ever asking for your location. Download the Harvest International Schools app and keep the school year in your pocket

About

Sigmakey

This utility provides a specialized keyboard for typing mathematical expressions, including fractions, roots, and Greek letters, directly within any app. It supports LaTeX, Unicode, and image output, with on-device processing for privacy and speed.

Highlights
  • Full math keyboard layout
  • Two-dimensional cursor for exponents/numerators
  • Type LaTeX, Unicode, or rendered image
  • On-device typesetting, no network required
  • Symbol search, recent, and favorite symbols
Features
Read full description

Sigmakey is a math keyboard for people who need to type actual math, anywhere you can type at all. Fractions, exponents, roots, Greek letters, and matrices sit one tap away, and the cursor moves right into a numerator or an exponent, so scientific notation looks the way it should. - A full math keyboard layout that works in any app with a text field - A two-dimensional field with a cursor that steps into fractions and powers - Type LaTeX, plain Unicode, or a rendered image, whichever the app expects - Everything typeset on device, with no network - Search for a symbol, or grab a recent or a favorite Drop an equation into a note, a message, or a homework app without hunting through menus. Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

H. I. S.4 screens
Sigmakey4 screens

Verdict

The call

The clearest difference is in-app purchases: H. I. S. at none against Sigmakey's 1. H. I. S. also leads on iOS requirement (17.6 vs 26.0). On price, ads and device support 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

Both are free to download. Sigmakey sells 1 one-off in-app purchase. H. I. S. asks for nothing beyond the download.

Scorecard2 real differences · 7 level
H. I. S. versus Sigmakey: the parameters behind the verdict, then further details
ParameterH. I. S.Sigmakey
PriceFreeFree
Rating—2.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better26.0
Further details — not scored
Size12 MB13 MB
Age rating4+4+
DeveloperAyman AgamyAndrii Bashta

In-app purchases

None

H. I. S.

No in-app purchases

1 purchases

Sigmakey

One-time1
  • Sigmakey Pro$9.99

Questions

Is H. I. S. free?
H. I. S. is free to download, with no in-app purchases.
Is Sigmakey free?
Sigmakey is free to download, with in-app purchases available.
Do H. I. S. or Sigmakey have ads?
Neither H. I. S. nor Sigmakey shows ads.

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