| Primary job | Keeps handwritten notes, numbers and plans legible and durable, wet or dry, with no battery involved. | Keeps a phone dry and usable, protecting the device that holds contacts, maps, torch and communication apps. |
| Works without power | Always — pen and coated paper need no charge and cannot run flat. | No — protects the phone, but the phone itself still needs battery to be useful. |
| Best use case | Recording key contacts, meter readings, medication times or a family emergency plan somewhere that survives a soaking or a dead phone. | Keeping a phone safe and operable near water — flooding, boating, storms, or wet-weather dog walks and commutes. |
| Reliability in a flood or storm | Extremely high — there's no seal to fail and no electronics to short out. | High but seal-dependent — a damaged pouch or poor seal can let water reach the phone. |
| Weight and pack size | Small, light, and pocket-sized; no charging cable or case bulk to carry. | Small and light, though slightly bulkier than the bare phone and needs its seal checked before use. |
| Best paired with | A grab bag, glovebox or family emergency plan folder, as a backup that never depends on a charged device. | A dry bag, flood kit or car kit, especially where the phone doubles as a torch, radio app or contact list. |
| Price band | Roughly £8 to £18. | Roughly £6 to £15. |
