DeffApp vs Plier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeffApp
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DeffApp – это удобное и надежное приложение для экстренной помощи. В опасной ситуации ты можешь мгновенно отправить SOS-сигнал своим доверенным контактам, указав свою геопозицию. Добавь близких в список доверенных контактов, чтобы они всегда могли прийти на помощь. Приложение работает в фоновом режиме и доступно в любой момент. Будь уверен в своей безопасности с DeffApp!
Plier
Transform your iPhone into an AI-powered car diagnostic tool. Connect to your vehicle via an OBD2 device to understand its health, diagnose issues, and estimate repair costs.
- AI-driven diagnostic reports
- Real-time OBD2 data and graphs
- Check engine light insights
- Repair cost estimation
- ELM327 Bluetooth compatibility
- Troubleshoot engine codes
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Turn your iPhone into a clear, capable OBD2 car scanner with Plier.AI. Connect a compatible Bluetooth ELM327 adapter to read diagnostic trouble codes, view live sensor data and graphs, and understand check-engine warnings. The new Vehicle Health Center brings together a health snapshot, mileage-based maintenance planning, official NHTSA recall checks for saved vehicles, inspection-readiness guidance, and a report you can share with a mechanic. Ask the AI Mechanic vehicle-aware questions about symptoms and active codes. Plier suggests practical tests, explains possible causes, and helps you decide what to check before replacing parts. You can also review supported freeze-frame and oxygen-sensor test data. Available data varies by vehicle, adapter, protocol, and model year. AI guidance and health scores can be wrong and are not proof that a vehicle is safe. Confirm safety-critical findings with a qualified technician. Some features require Plier Pro. Terms of Use: https://plier.ai/tos
Screenshots
Verdict
DeffApp and Plier are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. DeffApp sells 1 in-app purchase, starting at $0.99 per month and Plier sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.
DeffApp ships an update every 10 days, Plier weekly. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.
| Parameter | DeffApp | Plier |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (15 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 15 — better |
| Update frequency | Every 10 days | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 66 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Vitaliy Balayan | Heap Labs LLC |
In-app purchases
DeffApp
- Premium$0.991 Month
Plier
- Pro (Weekly)3 Days trial$6.997 Days
- Pro ( 1 Year )$49.991 Year
