Extra vs Stinger
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Extra
Understand your body's energy cycles to enhance productivity and vitality. Track energy levels, analyze activity impacts, and visualize historical data to identify patterns.
- Energy level tracking
- Activity impact analytics
- Historical data visualization
- Pattern and trend identification
- Productivity and vitality enhancement
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Empower yourself with knowledge about your body’s energy cycles and make informed decisions to boost your productivity and vitality. Tracking of your energy levels throughout the day. Detailed analytics showing how different activities impact your energy. Historical data visualization to identify patterns and trends. Terms of Use - https://powerlockapp.com/terms.html Privacy Policy - https://powerlockapp.com/policy.html
Stinger
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WHAT AMPS FOR 1/8 INCH? SOLVED. Pick the process, the metal and the thickness. Stinger answers with real machine settings: amperage, voltage, wire feed speed, gas and polarity, computed from the manufacturers' published charts instead of forum guesses. FREE FOREVER, NO COUNTER - MIG settings for mild steel, stainless and aluminum: amps, volts, wire feed speed, gas flow and transfer mode for every common wire size - Stick amperage for every rod in the catalog: 6010, 6011, 6013, 7014, 7018, 7024, stainless and cast iron nickel, with polarity, positions and the rod's personality - Sheet metal gauge to decimal to millimeters - Tungsten colour codes and current capacity - A defects guide: porosity, undercut, spatter, cracking, with causes and fixes STINGER PRO, ONE PAYMENT - TIG settings for steel, stainless and aluminum: amps, tungsten, cup, gas flow, filler size, and AC balance and frequency for aluminum - Flux core parameters for the self-shielded wires, straight from the wire makers' procedure tables - Heat input in kJ/in and kJ/mm, the number a WPS asks for - Preheat guidance from the carbon equivalent, with steel grade presets - Consumables math: filler weight per fillet, rods per pound, minutes left in the gas bottle - Weld symbols, joint fit-up, shielding gas guide and a which-rod-for-which-job selector - Save your machines and the dialed-in settings that actually worked BUILT FOR THE SHOP FLOOR - Works completely offline, in the yard, under the truck, behind the barn - Imperial and metric everywhere: fractions, gauges and millimeters side by side - Every table names its source. Every result is a starting point, and the app says so - No account, no ads, no tracking, no subscription. Your setups never leave your iPhone Stinger computes starting points from published manufacturer data. It is not a welding procedure specification and does not replace the filler maker's datasheet or your WPS.
Screenshots
Verdict
The clearest difference is update cadence: Extra at every 2 weeks against Stinger's every 4 weeks. Extra also leads on iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases 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. Extra sells 2 in-app purchases, starting at $9.99 per 7 days and Stinger sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Extra ships an update every 2 weeks, Stinger every 4 weeks. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.
| Parameter | Extra | Stinger |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (11 ratings) — better | — |
| Number of ratings | 11 — better | — |
| Update frequency | Every 2 weeks — better | Every 4 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | DATAWISE ANALYTICS LIMITED | Faruk Orman |
In-app purchases
Extra
- Premium3 Days trial$9.997 Days
- Premium$199.991 Year
Stinger
- Stinger Pro$9.99









