Conversion Calculator Plus vs Attendly
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Conversion Calculator Plus
This app is a versatile unit and currency converter with a user-friendly interface. It supports a wide range of conversion categories, including real-world and crypto currencies, with automatic exchange rate updates. Customize your experience with design options, dark mode, and adjustable home screen layouts.
- Unit and currency conversion
- Supports 160+ currencies (real & crypto)
- Automatic currency exchange rate updates
- Simple or carousel design options
- Dark Mode support
- Customizable home screen layout
- Split screen mode on iPad
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Whether you are measuring ingredients for a recipe, comparing currencies while traveling or working through an everyday calculation, Conversion Calculator Plus brings the tools together in one app. Convert among 685 units in 72 categories, with exchange rates for 160 currencies, 126 cryptocurrencies and four precious metals. NEW IN VERSION 3.0 • Currency+: compare multiple currencies in a list you can reorder, and calculate directly in the amount field. • Currency History: view historical exchange rates on a chart. • Built-in calculator: enter expressions in supported converters and see results update as you type. • Interactive Home Screen widgets: save a converter and calculate from the Home Screen. Premium required. • Siri: run a saved conversion by name, start a new conversion or update a widget's amount. Premium required; command availability depends on your iPhone's Siri language. UNIT CONVERSION • Convert length, area, weight, temperature, speed, time, pressure, volume, energy, data and many other measurements. • Work with cooking measures, shoe and ring sizes, running pace, fuel economy and blood sugar. • View results as you enter an amount, and copy them to use in other apps. CURRENCY AND MARKETS • Exchange rates for 160 world currencies update automatically. • Compare 126 cryptocurrencies and the prices of gold, silver, platinum and palladium. • Use Currency+ to compare several currencies at once and Currency History to examine past rates. PERSONALIZE YOUR WORKSPACE • Choose Classic, Modern Simple or Modern Carousel, and switch styles in Settings. • Save frequently used conversions as Favorites; edit, delete or reorder them. • Hide categories and units you do not use. • Search categories and units, and arrange category icons on the Home Screen. • Use the app on iPhone or iPad, including Split View on iPad. Light and dark appearances are supported. • Available in 33 app languages. PREMIUM Premium is an optional auto-renewing annual subscription. It removes ads, enables offline use, and unlocks interactive Home Screen widgets and Siri conversions. Payment is charged to your Apple Account when you confirm the purchase. It renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in your Apple Account settings. The price is shown before you confirm. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://developer-yl.github.io/convert-units-plus/privacy.html
Attendly
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Attendly is a staff app for managing attendance check-in at events, classes, and recurring gatherings. Designed for administrators and staff, Attendly turns any iPad or iPhone into a powerful check-in kiosk — fast, reliable, and easy to run. CHECK IN THREE WAYS • NFC badge tap — attendees tap their NFC card or sticker for instant check-in • QR code scan — camera-based scanning as a fast alternative • Manual lookup — staff can find and check in any attendee by name WORKS OFFLINE Attendly keeps working even when your internet goes down. Check-ins are saved locally and automatically synced to the server when the connection returns. Zero data loss, even in spotty venues. BUILT FOR STAFF AND ORGANIZERS • 6-digit PIN login keeps the kiosk secure • Session and course management for multi-week programs and recurring events • Real-time attendance roster for each session • NFC badge issuance — write attendee identity directly to NFC stickers and cards • Apple Wallet passes for attendees who prefer a digital badge PEOPLE-CENTERED HISTORY Every check-in builds a long-term attendance record. Easily answer questions like "Who has attended consistently?" and "Who has missed the last three sessions?" SIMPLE AND RELIABLE • No app required for attendees — only staff use this app • Under 3-second average check-in time • Multilingual interface (English, Korean, Spanish, French, Chinese) • Works on iPhone and iPad IDEAL FOR Schools, universities, corporate training, community organizations, religious groups, sports clubs, volunteer programs, and any recurring event that needs reliable attendance tracking.
Screenshots
Verdict
The clearest difference is in-app purchases: Attendly at none against Conversion Calculator Plus's 1. Attendly also leads on ads (none vs shown). Conversion Calculator Plus's advantage is update cadence (every 6 days vs every 2 months). On price, device support and iOS requirement 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
Both are free to download. Conversion Calculator Plus sells 1 in-app purchase, starting at $9.99 per year. Attendly asks for nothing beyond the download.
Conversion Calculator Plus ships an update every 6 days, Attendly every 2 months. The most recent releases landed on October 14, 2026 and October 13, 2026 respectively.
| Parameter | Conversion Calculator Plus | Attendly |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (15K ratings) — better | — |
| Positive reviews | 68.9% of reviews | — |
| Number of ratings | 15K — better | — |
| Update frequency | Every 6 days — better | Every 2 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 78 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Adysseus | Steve Cho |
Bugs and requests
Conversion Calculator Plus
Reported bugs
3 issues- Currency conversion not working
- App gets stuck on consent page
- Unable to get past ads/subscription page
Requested features
3 requests- Add running pace conversions
- Add shoe size converter
- Provide paid ad-free version
Attendly
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Conversion Calculator Plus
- No Ads For One Year1 Year trial$9.991 Year
Attendly
No in-app purchases
Questions
Is Conversion Calculator Plus free?
Is Attendly free?
Do Conversion Calculator Plus or Attendly have ads?
Which is updated more often, Conversion Calculator Plus or Attendly?
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