HSA vs CalcTooi
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HSA
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After connecting App to Car Amplifier with Integrated DSP, EQ, BASS, TIME ALIGNMENT, PHASE, MUTE, FILTER , SAVE SOUND SETTING TO PHONE, SAVE SOUND SETTING TO AMPLIFIER, LOAD SOUND SETTING FROM PHONE, RCA OUTPUT etc could be controlled through this App. How to use: 1.Install App and turn on power of car 2. Turn on Bluetooth on your iPhone 3,Open App and wait for around 5 seconds, then click “Connect” icon in left corner of bottom. Amplifier will be connected to App automatically. 4.DIY you preferred sound and then click “Save to AMP” icon to save. Or click “ Save to Phone” to save. Note： 1.Do not exit app during saving and do not turn off power supply, program may be shut down caused by this.
CalcTooi
This app offers a classic calculator experience with a retro design, ideal for daily math needs. It also features fun number games and the ability to create personalized digital stickers from calculations.
- Classic retro calculator design
- Basic arithmetic functions
- Save calculations as stickers
- Number and arithmetic games
- Dual dark and light themes
- Offline functionality
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CalcTooi is an exquisitely designed app that combines "classic style", "easy to use" and "fun". Guided by "less but better", it caters to daily math and basic calculation needs. In addition, the ability to save numbers as retro stickers lets you explore the fun of digital games like Beghilosz and more. Tags: Free | No ads | Optimized for iPhone | Pocket Calculator | Math Tool | Arithmetic Toy @ Better Design % • Classic Design: Inspired by the iconic Pocket ET66 handheld calculator, combining a retro aesthetic with modern simplicity. • Retro Theme: A fresh take on 80s nostalgia with dual dark and light themes that adapt seamlessly to your system settings. • Intuitive Use: Tailored for iPhone: lightweight, intuitive, offline-ready, and offering a smooth, native-like experience. ... @ Useful Tool % • Basic Calculation: Ready to use anytime, supports long-form, percentage conversions, positive/negative number and backspace for correction. • Save Calculations: Long press the screen to capture input formulas or results, with the option to save directly to your photo album. ... @ Fun Gameplay % • Number Games: Explore various calculator spelling or arithmetic games, experience retro culture or enjoy the moment of interaction with family and friends • Make Stickers: Enter secret codes, long press the screen to preview or flip designs, and create personalized stickers with one tap. ... Why choose CalcTooi ? Whether you’re seeking a modern digital replacement for retro electronics, a minimalist daily calculator, or an entertaining and educational math gadget, CalcTooi is worth a try. It might just become your go-to tool, silently serving your needs day after day. CalcTooi is free to download now—get started and explore it today! ：）
Screenshots
Verdict
The clearest difference is in-app purchases: HSA at none against CalcTooi's 1. HSA also leads on update cadence (every 3 weeks vs every 11 months) and device support (3 vs 1). On price and ads 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. CalcTooi sells 1 one-off in-app purchase. HSA asks for nothing beyond the download.
HSA ships an update every 3 weeks, CalcTooi every 11 months. The most recent releases landed on October 7, 2026 and October 27, 2026 respectively.
| Parameter | HSA | CalcTooi |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 weeks — better | Every 11 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | 杏生 卢 | S.H.Y Art&Tech Office |
In-app purchases
HSA
No in-app purchases
CalcTooi
- Buy a Coffee$3.00
