BabySilencer vs HP16C
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BabySilencer
This application provides visual stimulation for infants with colors, swirls, sounds, and songs. It serves as a distraction for feeding or soothing when upset, keeping babies engaged and happy. It's designed to aid in visual exercise for early development.
- Visual stimulation with colors and swirls
- Soothing sounds and songs
- Distraction for feeding and car seat
- Engages infants and toddlers
- Aids visual exercise for development
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Checkout the Facebook page: https://www.facebook.com/pages/BabySilencer/235652183150585 Here is what users are saying about BabySilencer ****************************************************************************************************** Truly silences infant with colors, swirls, sounds, songs and stimulation. My baby is hard to feed so he stares at this while taking bottle -- the perfect distraction. App also soothes when upset in car seat. Baby grabs phone and stares at colors. What a great invention. ****************************************************************************************************** Truly silences infant with colors, swirls, sounds, songs and stimulation. My baby is hard to feed so he stares at this while taking bottle -- the perfect distraction. App also soothes when upset in car seat. Baby grabs phone and stares at colors. What a great invention. ****************************************************************************************************** My 6 month old son always calms down after looking this. Works like a magic. ****************************************************************************************************** This app is amazing! From my 5 month old to my 4 year old- it's keeps their attention. I think my older kids secretly enjoy playing around with it too!! ;) ****************************************************************************************************** Fantastic app for baby. My 15 month old is hypnotized. Plus my husband is addicted to it. He plays she watches. No adverts either. Can't believe it's a free app. Well done ****************************************************************************************************** Infant's vision is very important for overall development. Between the ages of 3 months and 6 months, babies can focus on small objects and may begin to track them. This is a very useful application to provide you infant with the visual exercise they need and along with some fun. BabySilencer keeps your loved one happy, engaged and quite
HP16C
This app faithfully recreates the legendary HP 16C Computer Scientist calculator, offering advanced hex arithmetic, bit manipulation, and base conversion. It features RPN, keystroke programming, and modern enhancements like a two-line display and haptic feedback.
- Full RPN calculator
- Integer arithmetic (HEX, DEC, OCT, BIN)
- Configurable word size (1-64 bits)
- Complete bit operations
- Keystroke programming
- Two-line display
- Haptic feedback
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A faithful recreation of the legendary HP 16C Computer Scientist calculator for iPhone, with a few modern upgrades. If you've ever needed to perform hex arithmetic, bit manipulation, or base conversion on your phone and been frustrated by the available options, this is for you. RPN-16C gives you the full power of the original HP 16C in your pocket. WHAT IT DOES - Full RPN (Reverse Polish Notation) calculator - Integer arithmetic in HEX, DEC, OCT, and BIN - Configurable word size from 1 to 64 bits - Unsigned, one's complement, and two's complement modes - Complete bit operations: shift, rotate, rotate through carry, AND, OR, XOR, NOT, mask, bit set/clear/test, count bits, left justify - Float mode with configurable precision (FLOAT 0-9) - Keystroke programming with labels, subroutines, loops, and conditionals - Storage registers with direct and indirect addressing - Programs can be imported from text (long-press the display to paste) ENHANCEMENTS OVER THE ORIGINAL - Two-line display: see both X and Y registers at once. No more guessing what's on the stack. - Wider LCD: displays all 32 bits in binary without scrolling. The original could only show 8 at a time. - Haptic feedback on every key press - State persistence: pick up right where you left off - SHOW function to peek at values in other bases FAIR WARNING This is a quirky calculator. It uses Reverse Polish Notation, has no equals key, and expects you to know what two's complement means. If you're looking for a simple calculator, this is not it. If you've ever wished you could do a bitwise rotate through carry on your phone, welcome home. DESIGNED FOR PROGRAMMERS The key layout matches the physical HP 16C exactly, including the f (gold) and g (blue) shift labels. If you know the original, you already know this one. The original HP 16C Owner's Handbook is freely available on the Internet Archive: https://archive.org/details/hp-16c_handbook
Screenshots
Verdict
The clearest difference is update cadence: HP16C at weekly against BabySilencer's every 5 months. BabySilencer's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.
BabySilencer ships an update every 5 months, HP16C weekly. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | BabySilencer | HP16C |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.3 (4 ratings) — better |
| Positive reviews | 53.8% of reviews | — |
| Number of ratings | — | 4 — better |
| Update frequency | Every 5 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 25 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | jolly1312 | Michael Doornbos |
Customer experience
BabySilencer
HP16C
In-app purchases
BabySilencer
No in-app purchases
HP16C
No in-app purchases









