fCalendar vs DustByte
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
fCalendar
This app functions as a desktop calendar, allowing users to jot down notes and reminders. It facilitates conversions between the Persian, Gregorian, and Hijri calendars, and helps users find specific weekdays for any given date.
- Note-taking and reminders
- Persian to Gregorian conversion
- Gregorian to Persian conversion
- Hijri calendar conversion
- Weekday finder for any date
- Add, edit, and delete notes
- Beautiful interface
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fCalendar is a desktop calendar for writing any notes and other remember things and convert Persian Calendar to Gregorian calendar and Hijri Calendar and vice versa. With fCalendar you can find weekday at any date, and convert your day to other calendar for example you can find your birthday weekday and find this day in other calendar. Specifications: -Beautiful interface -Add, edit, delete notes -Convert between calendars -Find your own days in other calendars -Easily use and jumping between years, months and days -You can add Daily, Weekly, Monthly, Yearly and static notes. fCalendar يك تقويم روميزي جهت يادداشت ها و يادآورها مي باشد و درضمن تقويم خورشيدي را به ميلادي و قمري و برعكس تبديل مي كند. با fCalendar مي توانيد روز هفته هر تاريخي را كه مي خواهيد پيدا كرده و نيز تبديل آن به ديگر تقويم ها را مشاهده نماييد به عنوان مثال شما مي توانيد روز هفته اي را كه به دنيا آمده ايد پيدا نماييد و نيز تبديل آن روز به ميلادي و قمري را مشاهده نماييد. مشخصات: -داراي صفحه زيبا -قابليت اضافه كردن، اصلاح كردن و پاك نمودن يادداشت ها -تبديل بين تقويم ها -پيدا كردن روز مورد نظر شما در تقويم هاي ديگر -راحتي استفاده و نيز رفتن آسان بين سالها، ماه ها و روزهاي دلخواه - داراي مناسبت هاي جهاني، مذهبي و ملي همراه با تعطيلات رسمي ايران - امکان نوشتن یادداشتهای روزانه، هفتگی (مانند برنامه هفتگی کلاسی)، ماهیانه (مانند سررسید اقساط ماهیانه)، سالیانه (مانند روزهای تولد، سالگرد ازدواج …) و یادداشت کلی (که همیشه تکرار می شود).
DustByte
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Free up space on your iPhone in minutes. DustByte finds duplicate and similar photos, unwanted videos, WhatsApp media, duplicate contacts and files, and shows exactly how much space each cleanup frees. A built-in System Monitor shows CPU, memory, storage, network and heat in real time. Everything runs on your device. PURCHASE REQUIRED: DustByte is free to download, but all features below require the free 7-day trial or the one-time Lifetime Access in-app purchase. The trial is not a subscription: nothing is charged and nothing renews. REVIEW & CLEAN • One tap walks you through everything worth cleaning, then deletes it all with a single confirmation • Review one list at a time, or one page each for photos, videos and WhatsApp • See how much space you freed when you're done PHOTO CLEANER • Duplicates: exact copies of the same photo • Similar Photos: bursts and near-identical shots, with the best one picked for you based on sharpness, faces and quality • Screenshots, Blurry and Accidental shots • Documents and Codes & Tickets: one-time codes, boarding passes, receipts and tickets you no longer need • Analysis runs on your iPhone, and the full library is analyzed overnight while charging VIDEO CLEANER • Duplicate videos • Large, Long, Screen Recordings, Short Clips, Slo-mo and Time-lapse lists • Accidental videos: pocket recordings and clips started by mistake • Sorted without downloading your iCloud videos CONTACTS, WHATSAPP AND FILES • Merge duplicate contacts, matched by phone number, email or name • Choose which note to keep. Contacts that can't be merged without losing details are left untouched. • Review saved WhatsApp media and clear what you no longer need • Find duplicate files in any folder in the Files app SYSTEM MONITOR • Live CPU, memory, storage and thermal state on one dashboard • Floating monitor window that stays on screen while you use other apps • Live Activity with CPU and RAM on the Lock Screen and Dynamic Island while the floating window is on • CPU: user, system and idle load, plus usage per core • Memory: app, wired, compressed, cached and free, with pressure level • Network: live download and upload graphs, Wi-Fi or cellular, local IP, Low Data Mode and VPN status • Built-in speed test and latency check • Daily Wi-Fi and cellular data usage • Free-space trend, day by day • Health tips that point you to the cleanup that frees the most space • Share a PDF report of your device's status ALERTS • Low storage warnings • High CPU, memory pressure and overheating alerts while DustByte is open or the floating window is on WIDGETS AND SIRI • System widget: CPU, memory, storage, battery and thermal state, in every size from small to extra large • Storage widget for the Home Screen and Lock Screen • Quick Clean widget with shortcuts to each cleaner • Ask Siri: "How much can DustByte clean up", "How much storage is free in DustByte" or "Check my device status in DustByte" MAKE IT YOURS • Turn lists on or off, set what counts as a large, short or long video, and choose how alike photos must be to group as similar • Stats: see how much space you've freed and how many contacts you've merged PRIVATE BY DESIGN • Scanning, photo analysis and monitoring happen entirely on your device • Your photos, contacts and files are never uploaded • The speed test only exchanges test data with Cloudflare • No account needed, no tracking PRICING: FREE TRIAL, THEN PAY ONCE • All features require the free 7-day trial (once per Apple Account) or the Lifetime Access in-app purchase • When the trial ends, features are locked until you buy Lifetime Access, a one-time in-app purchase. No subscription. • Lifetime works on all your iPhones and iPads signed in with the same Apple Account • Already purchased? Tap Restore on the purchase screen Works on iPhone and iPad. Website: https://dustbyte.app/ Privacy Policy: https://dustbyte.app/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is price: DustByte at Free against fCalendar's $1.99. DustByte also leads on update cadence (every 3 weeks vs every 9 months). fCalendar's advantage is in-app purchases (none vs 2) and iOS requirement (13.0 vs 17.0). On 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
DustByte is free to download; fCalendar costs $1.99 up front. DustByte sells 2 in-app purchases, starting at $1.49 per month. fCalendar asks for nothing beyond the download.
fCalendar ships an update every 9 months, DustByte every 3 weeks. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | fCalendar | DustByte |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.9 (28 ratings) — better | — |
| Positive reviews | 59.1% of reviews | — |
| Number of ratings | 28 — better | — |
| Update frequency | Every 9 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 11 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Farzad Rashvand | Sagar Purohit |
In-app purchases
fCalendar
No in-app purchases
DustByte
- Unlimited Access (1 Month)$1.491 Month
- Unlimited Access (1 Year)$14.991 Year









