Prototo vs Solace
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Prototo
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You're designing an app. Open it in Prototo and see it the way it was meant to be seen on your phone, in full fidelity. Prototo is a viewer for native prototypes. Tap a link and the design opens full-screen on your device, with the detail that flat mockups and screen recordings can never capture: โข Real Liquid Glass: genuine system materials, not screenshots faking the look โข Real gestures: swipe, scroll, drag, and tap with true native response โข Real haptics: feel every tap and transition the way people actually will โข Real navigation: native nav bars, sheets, and transitions FOR STAKEHOLDERS, REVIEWERS & CLIENTS Stop reviewing designs as static images or laggy videos. You hold the actual feel of the product in your hand, how it moves, how it responds, how it sounds. You'll give sharper feedback because you're experiencing the real thing, not imagining it from a picture. FOR DESIGNERS Preview your own work on-device as you go. See exactly how your prototype behaves with real materials, real motion before anyone else does so every reviewer sees the same high-fidelity preview. No builds to distribute, no TestFlight invites to chase. WHY PROTOTO Design tools render an approximation of native apps. Prototo displays the real thing, using the same native interface components your shipping app will. What you preview is what your users will feel. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Solace
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``` Solace Buzz is a workspace where people and AI workers do the work together โ and where every action a worker takes has an owner, a limit, and a record. Chat is the easy half. Channels, threads, direct messages, search, reactions, an activity inbox: the parts of a team workspace you already know. The half that matters is what happens when a worker acts on your company's behalf. AN AI DEPARTMENT SOMEONE CAN BE HELD TO A worker in Solace Buzz holds a declared seat. It acts under a policy that can refuse it. It spends against a budget that runs out. Everything it does outward leaves an evidence record you can read later, in the room where it happened, next to the humans who were there. An agent that cannot be audited is not staff โ it is exposure. A SERVER YOU RUN Solace Buzz pairs to a relay โ the server your workspace lives on. Run it yourself and your conversations and records never touch our infrastructure. Would rather not run a server? We host relays too, and the app always tells you which one you are paired with. AN IDENTITY THAT IS A KEY, NOT A ROW You join by scanning a pairing code from your workspace. Your identity is a cryptographic keypair held in the device keychain โ not an email address in someone else's user table. Nothing to recover from us, because we hold nothing. BUILT ON OPEN SOFTWARE Solace Buzz is built on Buzz, the open-source workspace from Block, under the Apache 2.0 license. The relay is software you can read, run and keep โ the workspace is yours in the sense that matters, which is that you can take it somewhere else. WHAT THIS RELEASE IS An alpha developer preview, and it is honest about that: โข A relay is required. Without one, this app has nothing to connect to and nothing to show you. It is not usable standalone. โข Features change between builds, and stored data may not survive an upgrade. โข Agent seats, budgets and policy enforcement are administered from the desktop and command-line surfaces; the phone is where you read, approve and intervene. If you are evaluating whether an AI workforce can be governed rather than merely prompted, this is the client to carry. If you want a chat app, there are better ones, and we would rather you used those. Solace Buzz โ where people and workers build a company together.
Screenshots
Verdict
The clearest difference is update cadence: Prototo at every 3 days against Solace's weekly. Solace's advantage is iOS requirement (16.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Prototo ships an update every 3 days, Solace weekly. Both last shipped on October 31, 2026.
| Parameter | Prototo | Solace |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days โ better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone |
| Requires iOS | 26.0 | 16.0 โ better |
| Further details โ not scored | ||
| Size | 71 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Sherizan Sheikh | Phuc Truong |
In-app purchases
Prototo
No in-app purchases
Solace
No in-app purchases









