4C Calculator vs Grid Getter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
4C Calculator
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4C Calculator is created to assist users in determining the estimated price range for diamonds based on available criteria; Color, Carat, Clarity, and Shape. The price shown is an estimate based on the updated diamond price.
Grid Getter
Optimize your Tesla Powerwall for significant savings on electricity bills. This app automates battery dispatch to beat demand charges and maximize solar self-use. Gain detailed insights with a live dashboard and customizable rules.
- Beat demand charges with DemandGuard
- Maximize solar self-use
- Optimize TOU charging and discharging
- Customizable automation rules
- Live energy dashboard
- Works with Powerwall 2, +, and 3
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Your Powerwall makes generic decisions with your money. Grid Getter makes specific ones. Connect in under 5 minutes, set your targets, and let Grid Getter dispatch your battery against your actual rate plan, every 60 seconds. Built by a Powerwall owner who got tired of watching the meter. BEAT DEMAND CHARGES One 30-minute spike can set your entire bill. DemandGuard watches every interval, aligned to your utility's billing window, and covers the peak with your battery. Subscribers averaged $64 in demand savings in August 2026. RULES, NOT MODES The Tesla app gives you modes. Grid Getter gives you rules. Unlimited automations, evaluated every 60 seconds, built from your logic instead of presets. You'll never maintain the script. KEEP YOUR SUNSHINE ON YOUR METER Your solar shouldn't leave at wholesale and come back at retail. Solar Self-Use keeps your generation on your side of the meter, up to 92% self-consumption. CHARGE WHEN IT'S CHEAP. USE WHEN IT'S NOT. TOU Optimizer charges the battery in cheap windows and spends it in expensive ones. Automatically. SEE WHERE EVERY WATT GOES The free live dashboard samples your system every 60 seconds. Start there; your own data will make the case. WORKS WITH Tesla Powerwall 2, Powerwall+, and Powerwall 3. PLANS Free: live energy dashboard, one automation, mobile + web. Scheduled: unlimited automations, Solar Self-Use, TOU Optimizer, 12-hour weather forecast. Adaptive: everything in Scheduled, plus DemandGuard peak-cap automation, a configurable grid-draw target, and full energy data export. Set your goals once. Grid Getter holds the line. NOTES Grid Getter is not affiliated with Tesla. Feature availability can vary based on your system configuration, utility rate plan, and connectivity. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: 4C Calculator at none against Grid Getter's 4. 4C Calculator also leads on iOS requirement (15.1 vs 17.6). Grid Getter's advantage is update cadence (every 2 days vs monthly). On price, 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
Both are free to download. Grid Getter sells 4 in-app purchases, starting at $4.99 per month. 4C Calculator asks for nothing beyond the download.
4C Calculator ships an update monthly, Grid Getter every 2 days. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.
| Parameter | 4C Calculator | Grid Getter |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 0.0% of reviews |
| Update frequency | Monthly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.1 — better | 17.6 |
| Further details — not scored | ||
| Size | 40 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Crane Central | Marshland Software LLC |
In-app purchases
4C Calculator
No in-app purchases
Grid Getter
- Premium7 Days trial$4.991 Month
- DemandGuard + Premium7 Days trial$10.991 Month
- Premium7 Days trial$54.991 Year
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- DemandGuard + Premium7 Days trial$112.991 Year
Questions
Is 4C Calculator free?
Is Grid Getter free?
Do 4C Calculator or Grid Getter have ads?
Which is updated more often, 4C Calculator or Grid Getter?
Other comparisons
