Calculator +ㅤ vs Cava Guard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Calculator +ㅤ
This app simplifies math with basic, scientific, and fraction calculations. It also features a unique snap-and-scribble function to solve problems from photos. Customize your experience with themes and access a calculation history.
- Snap and Scribble Calculator
- Basic Calculator
- Scientific Calculator
- Fraction Calculator
- Currency Converter
- Calculation History
- Customizable Themes
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Calculator + App, the simplest way to make Math easy! Whether it's basic, scientific, fractions or even solving a problem you take a picture of. We've got you covered! • Snap and Scribble Calculator (NEW!) • Optimized for iPhone & iPad • Basic Calculator • Scientific Calculator • Fraction Calculator • Currrency Converter • Calculation History • Customize with Themes • Simple & Intuitive Design Introducing Rocket Apps PRO: With Rocket Apps PRO you simply subscribe once and get access to all supported Rocket Apps. The best part: we will keep adding new Apps. SUPPORT Our goal is to build the best apps in the world. You can help us by reporting bugs and requesting features via Email: help@rocketapps.com TERMS & PRIVACY https://rocketapps.com/privacy.html https://rocketapps.com/terms.html SUBSCRIPTION TERMS: The App offers an auto-renewing monthly or yearly subscription to provide you with unlimited access to all PRO Features while you maintain an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable.
Cava Guard
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Cava Guard watches the temperature inside your wine fridge and tells you the moment something is wrong — including when the sensor itself goes quiet. IMPORTANT: THIS APP NEEDS HARDWARE YOU RUN YOURSELF Cava Guard is the iPhone client for a small monitoring server that runs on your own Raspberry Pi, with a Zigbee temperature sensor inside the fridge. Without that server the app has nothing to show you. Everything you need is listed at cavaguard.com. You do not need any of it to look first: tap "Look around without a Pi" on the opening screen to explore a sample cellar with invented readings. WHAT IT DOES • Live temperature from every sensor, and the history behind it — six hours to a year, with the highs and lows that an averaged reading hides. • Alerts that break through. Set a range per fridge; going outside it sends a time-sensitive notification that Focus does not hold back. • Alerts on silence. A sensor that stops reporting raises an alarm of its own. A monitor that fails quietly is worse than no monitor at all. • Battery and signal strength for every sensor, so a dying cell is something you replace rather than something you discover. • More than one place. A fridge in another house is simply another server in the list, and alerts reach you from all of them. WHAT IT DOES NOT DO • No cloud. Readings travel from the sensor to your Pi and from your Pi to your phone. There is no service in the middle, because there is no service. • No account. Nothing to sign up for and nothing to sign in to. • No subscription, no advertising, no analytics. The app is free and collects nothing whatsoever. AWAY FROM HOME At home the app talks to your Pi directly over your own network. To reach it from anywhere else it uses Tailscale, which you turn on from inside the app — no ports opened on your router, no dynamic DNS, and a real certificate.
Screenshots
Verdict
The clearest difference is in-app purchases: Cava Guard at none against Calculator +ㅤ's 6. Cava Guard also leads on ads (none vs shown) and update cadence (every 2 days vs fortnightly). Calculator +ㅤ's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price 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. Calculator +ㅤ sells 6 in-app purchases, starting at $2.99 per 7 days. Cava Guard asks for nothing beyond the download.
Calculator +ㅤ ships an update fortnightly, Cava Guard every 2 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.
| Parameter | Calculator +ㅤ | Cava Guard |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (4.6K ratings) — better | — |
| Positive reviews | 46.7% of reviews | — |
| Number of ratings | 4.6K — better | — |
| Update frequency | Fortnightly | Every 2 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 55 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | Rocket Apps GmbH | LastingNote LLC |
Bugs and requests
Calculator +ㅤ
Reported bugs
3 issues- Inaccurate square root calculations
- Compatibility issues on iPad
- Decimal point not recognized
Requested features
4 requests- Negative number support
- Improved fraction calculator
- Scientific calculator layout
- Option to disable history feature
Cava Guard
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Calculator +ㅤ
- Rocket Apps PRO Weekly3 Days trial$2.997 Days
- Rocket Apps PRO Monthly3 Days trial$4.991 Month
- Rocket Apps PRO Yearly3 Days trial$9.991 Year
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- Rocket Apps PRO Offer1 Year trial$19.991 Year
- Rocket Apps PRO Yearly3 Days trial$19.991 Year
- Rocket Apps PRO Yearly3 Days trial$29.991 Year
Cava Guard
No in-app purchases
Questions
Is Calculator +ㅤ free?
Is Cava Guard free?
Do Calculator +ㅤ or Cava Guard have ads?
Which is updated more often, Calculator +ㅤ or Cava Guard?
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