HDL 100 vs Stolo Systems
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HDL 100
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1. This is an APP for VECTOR 100 Pro laser range finder. 2. It has the functions of ranging, sketching, scene labeling, Excel recording data, CAD drawing and so on. 3. Export pictures and PDF files to share with others.
Stolo Systems
This app provides encrypted, off-grid messaging that functions without internet connectivity. It creates a peer-to-peer mesh network using Wi-Fi, cellular, or LoRa radio, enabling secure communication of messages, photos, voice notes, and GPS locations even when cell towers or servers are unavailable.
- Off-grid encrypted messaging
- Peer-to-peer mesh network
- Works without internet
- End-to-end encryption
- Offline world map
- Emergency SOS beacon
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Stolo is an encrypted messenger that built off of Reticulum and LXMF Out of the box it is a private, end-to-end encrypted messenger: no account, no phone number, no sign-up. Your identity and your history live only on your device, and Stolo's gateway relays your messages across the internet. When you need more, the same app becomes your own network. Create a network, share one invitation, and everyone who joins is in each other's contacts, trusted, automatically. Phones link directly over Wi-Fi and cellular, and optional long-range LoRa radios carry messages where there is no signal at all. Messages to someone out of range wait and are delivered when they come back. What you can send, on or off the grid: • Messages, photos, and voice notes, end-to-end encrypted. Only the people in the conversation can read them. Not us. • Live GPS positions on a built-in offline world map. See yourself and your team with zero connectivity. Under the hood, Stolo is built on Reticulum, the open cryptographic mesh stack, and sets up in a minute with no config files. Used for backcountry trips, maritime, job sites, disaster response, and everyday group chats that should stay between the people in them. Built on privacy. Works every day, everywhere, and keeps working when nothing else does.
Screenshots
Verdict
The clearest difference is update cadence: Stolo Systems at every 3 weeks against HDL 100's every 2 months. HDL 100's advantage is iOS requirement (8.0 vs 15.0). 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. Neither carries in-app purchases, so what you see is what you pay.
HDL 100 ships an update every 2 months, Stolo Systems every 3 weeks. The most recent releases landed on October 13, 2026 and October 5, 2026 respectively.
| Parameter | HDL 100 | Stolo Systems |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.7 (10 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 10 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 154 MB | 265 MB |
| Age rating | 4+ | 4+ |
| Developer | Hultafors Group AB | Stolo Systems Inc. |
In-app purchases
HDL 100
No in-app purchases
Stolo Systems
No in-app purchases









