Current rank
- Was
- Not charting24 hours ago
- Change
- New entry
- Best
- #89in 24 hours
On January 4, 1972, Hewlett-Packard announced the HP-35, world's first scientific calculator small enough to fit in a pocket - more precisely, Bill Hewlett's shirt-pocket. The HP-35 was an immediate hit with students, engineers, and scientists. Despite its steep price of $395 (about $3000 today), it sold ten times better than anticipated in the first year. Experience this unique calculator that won HP the prestigious "IEEE Milestone in Electrical Engineering and Computing" in 2009. Features:
Competitors
Full chartTop of Paid · Productivity in United States. RPN-35 SD is #89 there. Changes are over 7 days.
- #1 (number one)Up 2 places
Goblin ToolsSkyhook - #2Down 1 place
QuickBend: Conduit BendingBret Hardman - #3Up 2 places
Things 3Cultured Code GmbH & Co. KG - #4Up 16 places
LineLearnerPeter Allday - #5Up 1 place
ScrivenerLiterature & Latte - #6Up 1 place
Site Audit ProVeam Studios Ltd - #7Up 5 places
TampermonkeyJan Biniok - #8Up 2 places
Ugly's Electrical ReferencesInformed Publishing - #9Up 2 places
Due - Reminders & TimersDue Apps LLP - #10Down 1 place
iBend PipeFrancisco Alcala - #11Up 3 places
Conduit: Open WebUI & AITunap Paul - #12Down 4 places
2Do: To Do List & Task ManagerBeehive Innovations Services - #13Up 17 places
CamScanner + | OCR ScannerLinguan Data - #14Up 1 place
Groundwire: VoIP SIP SoftphoneAcrobits - #15Down 2 places
Oilfield CalendarGoodStamp - #16Up 6 places
iFacialMocapDevelopW LLC - #17Up 6 places
Dark Reader for SafariDark Reader Ltd - #18Down 14 places
Pipe Fitter CalculatorLMF.Services - #19New entry
- #20Down 2 places
Alimentor 2: Custody TrackerTomasz Domanski
Store listing
How the app presents itself on the App Store. Select a screenshot to open it full size.
What's new
Version 2.4 · 16 Oct 2025 · 1 year ago
• Improved compatibility with iPhone Air and iOS 26.
Current rankings
Every chart this app is in right now, best position first.
| Chart | Rank | 24 h | 7 days | Best | Days on chart |
|---|---|---|---|---|---|
| United States· Paid · Productivity · best #89 · 1 day | #89 | New entry | Change unknown | #89 | 1 |
Rank history
Higher on the chart is better: #1 is at the top.
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United States · Paid · Productivity: best #89, latest #89, over 3 snapshots since 19 Oct.
Ranking events
Entries, big moves, #1s and new versions we've recorded.
- Entered the Paid · Productivity chart at #89United States
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